Processing

Please wait...

Settings

Settings

1. NZ500968 - Oxygen scavenger accelerator

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

WHAT WE CLAIM IS:

1. An oxygen scavenging packet for use in a modified atmosphere package, comprising:

(a) a plurality of side walls defining an enclosed space;

(b) an oxygen absorber within the enclosed space, said oxygen absorber comprising iron, silica gel, and a carbon dioxide generator; and

(c) a liquid oxygen uptake accelerator located within a separate compartment within the enclosed space , said oxygen uptake accelerator comprising water, wherein said separate compartment within the enclosed space is capable of being ruptured; wherein the contents of said separate compartment consist essentially of the liquid oxygen uptake accelerator;

said liquid oxygen uptake accelerator which is present in said packet in an amount in the range of from about 0.2 ml to about 0.8 ml for each approximately 2.5 grams of iron wherein a packet containing approximately 5 grams of iron is capable of reducing the oxygen concentration in a quart-sized modified atmosphere package consisting essentially of air having about 2% oxygen and about 20% carbon dioxide to less than about 0.5% oxygen in about 90 minutes at about 34°F immediately after the oxygen absorber comes into contact with the oxygen uptake accelerator.

2. The oxygen scavenging packet of claim 1, wherein said oxygen uptake accelerator is present in said packet in an amount between about 0.3 ml and about 0.7 ml per approximately 2.5 grams of said iron.

3. The oxygen scavenging packet of claim 1, wherein approximately 0.6 ml of said oxygen uptake accelerator is present in said packet per approximately 2.5 grams of said iron.

4 . The oxygen scavenging packet of claim 1 , wherein said oxygen uptake accelerator is contained within a frangible capsule and the oxygen uptake accelerator is introduced directly onto the oxygen absorber by rupturing the frangible capsule.

5 . The oxygen scavenging packet of claim 1, wherein said oxygen uptake accelerator is contained within a bibulous wick, wherein said wick extends from the

15 INTELLECTUAL PROPERTY

OFFICE OF N.Z.

2 3 NOV 2001

R E C E I V E D

exterior of said packet, through at least one of sa 5ra0 plur Qality ^ of woallstf and into said enclosed space.

6 · The oxygen scavenging packet of claim 1 , wherein said oxygen uptake accelerator further comprises an acid.

7. The oxygen scavenging packet of claim 6 , wherein said oxygen uptake accelerator comprises approximately five percent acetic acid.

8 . The oxygen scavenging packet of claim 1 , wherein said silica gel is impregnated with the carbon dioxide generator.

9. The oxygen scavenging packet of claim 1, wherein approximately 0.4 to about 0.6 ml of said oxygen uptake accelerator is present in said packet per approximately 2.5 grams of said iron.

10. The oxygen scavenging packet of any one of claims 1 to 9, wherein said packet further comprises a means for introducing said liquid oxygen uptake accelerator directly onto the oxygen absorber .

11. The oxygen scavenging packet of claim 6, wherein said acid is citric acid. 12. The oxygen scavenging packet of claim 6 , wherein said acid is acetic acid.

13. The oxygen scavenging packet of any one of claims 1 to 12, wherein said oxygen uptake accelerator further comprises a salt .

14. The oxygen scavenging packet of claim 13 , wherein said salt is selected from the group consisting of NaCl, CaCl2, and MgCl2.

15. The oxygen scavenging packet of claim 1, wherein said oxygen uptake accelerator further comprises copper.

16. The oxygen scavenging packet of any one of claims 1 to 15, wherein the iron is electrolytically annealed and reduced.

17. A method for reducing the oxygen concentration in a modified atmosphere package which comprises an oxygen sensitive material, comprising the steps of:

(a) placing an oxygen scavenging packet in the package, said oxygen scavenging packet comprising:

INTELLECTUAL PROPERTY OFFICE OF N.Z. (l) a plurality of side walls defining an enclosed space; and

2 3 NOV 2001 (ii) an oxygen absorber within the enclosed space, said oxygen absorber

R E C E I V E D comprising iron, silica gel, and a carbon dioxide generator;

16

(b) introducing a liquid oxygen uptake accelerator comprising water directly onto said oxygen absorber; and

(c) immediately sealing the modified atmosphere package;

wherein the amount of liquid oxygen uptake accelerator which is introduced into said packet is an amount in the range of from about 0 . 2 mL to about 0 . 8 mL for each approximately 2 . 5 grams of said iron .

18 . The method of claim 17 , wherein said oxygen uptake accelerator is present in said packet in an amount between about 0.3 ml and about 0.7 ml per approximately 2.5 grams of said iron.

19 . The method of claim 18 , wherein approximately 0.4 to about 0.6 ml of said oxygen uptake accelerator is present in said packet per approximately 2.5 grams of said iron.

20 . The method of claim 19 , wherein approximately 0.6 ml of said oxygen uptake accelerator is present in said packet per approximately 2 5 grams of said iron.

21 . The method of claim 18 , wherein said oxygen uptake accelerator is contained within a frangible capsule and the oxygen uptake accelerator is introduced directly onto the oxygen absorber by rupturing the frangible capsule.

22 . The method of claim 18 , wherein said oxygen uptake accelerator is contained within a bibulous wick, wherein said wick extends from the exterior of said packet, through at least one of said plurality of walls and into said enclosed space.

23 . The method of any one of claims 17 to 22 , wherein said oxygen uptake accelerator further comprises an acid .

24 . The method of claim 23 , wherein said acid is citric acid.

25 . The method of claim 23 , wherein said acid is acetic acid.

26 . The method of claim 25 , wherein said oxygen uptake accelerator comprises approximately five percent acetic acid.

INTELLECTUAL PROPERTY i OFFICE OF N.Z.

17 2 3 NOV 2001

R E C E I V E D

27. The method of claim 18, wherein said silica gel is impregnated with the carbon dioxide generator.

28. The method of claim 18, wherein said packet further comprises a means for introducing said liquid oxygen uptake accelerator directly onto the oxygen absorber.

29. The method of any one of claims 17 to 28, wherein said oxygen uptake accelerator further comprises a salt .

30. The method of claim 29, wherein said salt is selected from the group consisting of NaCl, CaCl2, and MgCl2.

31. The method of claim 18, wherein said oxygen uptake accelerator further comprises copper.

32. The method of claim 18, wherein said step of introducing said oxygen uptake accelerator directly onto said oxygen absorber includes injecting said oxygen uptake accelerator onto said oxygen absorber.

33. The method of claim 32, wherein said step of introducing said oxygen uptake accelerator directly onto said oxygen absorber is carried out using a syringe.

3 . The method of claim 33 , wherein said step of introducing said oxygen uptake accelerator directly onto said oxygen absorber includes placing into said packet a frangible capsule containing the oxygen uptake accelerator, wherein the oxygen uptake accelerator is introduced directly onto the oxygen absorber by rupturing the frangible capsule.

35. The method of any one of claims 17 to 34, wherein the iron is electrolytically annealed and reduced.

36. A method for minimizing metmyoglobin formation in fresh meat which is contained within a modified atmosphere package, comprising the steps of:

(a) placing an oxygen scavenging packet in the package, said oxygen scavenging packet comprising:

(i) a plurality of side walls defining an enclosed space; and

(ii) an oxygen absorber within the enclosed space, said oxygen absorber comprising iron, silica gel, and a carbon dioxide generator;

(b) introducing a liquid oxygen uptake accelerator comprising water directly onto said oxygen absorber; and

(c) immediately sealing the modified atmosphere package;


18


wherein the amount of liquid oxygen uptake accelerator which is introduced into said packet is an amount in the range of from about 0.2 mL to about 0.8 mL for each approximately 2.5 grams of said iron.

37. The method of claim 36, wherein said oxygen uptake accelerator is present in said packet in an amount between about 0.3 ml and about 0.7 ml per approximately 2.5 grams of said iron.

38. The method of claim 37 , wherein about 0.4 to about 0.6 ml of said oxygen uptake accelerator is present in said packet per approximately 2.5 grams of said iron.

39. The method of claim 38, wherein approximately 0.6 ml of said oxygen uptake accelerator is present in said packet per approximately 2.5 grams of said iron.

40. The method of claim 37, wherein said oxygen uptake accelerator is contained within a frangible capsule and the oxygen uptake accelerator is introduced directly onto the oxygen absorber by rupturing the frangible capsule.

41. The method of claim 37, wherein said oxygen uptake accelerator is contained within a bibulous wick, wherein said wick extends from the exterior of said packet, through at least one of said plurality of walls and into said enclosed space.

42. The method of any one of claims 36-41, wherein said oxygen uptake accelerator further comprises an acid.

43. The method of claim 42 , wherein said acid is citric acid.

44. The method of claim42 , wherein said acid is acetic acid.

45. The method of claim 44, wherein said oxygen uptake accelerator comprises approximately five percent acetic acid.

46. The method of claim 37 , wherein said silica gel is impregnated with the carbon dioxide generator.

47. The method of claim 37, wherein said packet further comprises a means for introducing said liquid oxygen uptake accelerator directly onto the oxygen absorber.

INTELLECTUAL PROPERTY

19 OFFICE OF N.Z.

2 3 NOV 2001

R E C E I VE D

48. The method any one of claims 36-47, wherein said oxygen uptake accelerator further comprises a salt .

49. The method of claim 48, wherein said salt is selected from the group consisting of NaCl, CaCl2, and MgCl2.

50. The method of claim 37, wherein said oxygen uptake accelerator further comprises copper.

51. The method of claim 37, wherein said step of introducing said oxygen uptake accelerator directly onto said oxygen absorber includes injecting said oxygen uptake accelerator onto said oxygen absorber.

52. The method of claim 51, wherein said step of introducing said oxygen uptake accelerator directly onto said oxygen absorber is carried out using a syringe.

53. The method of claim 52, wherein said step of introducing said oxygen uptake accelerator directly onto said oxygen absorber includes placing into said packet a frangible capsule containing the oxygen uptake accelerator, wherein the oxygen uptake accelerator is introduced directly onto the oxygen absorber by rupturing the frangible capsule.

54. The method of any one of claims 36-53, wherein the iron is electrolytically annealed and reduced.

INTELLECTUAL PROPERTY OFFICE OF N.Z.

2 3 NOV 2001

20 R E C E I V E D

50096

55. An oxygen scavenging packet, comprising'

a. an oxygen permeable material formed into a closed packet for holding an oxygen absorber;

b. an oxygen absorber comprising iron within the packet of (a), and

c. a liquid oxygen uptake accelerator, said accelerator comprising water, said accelerator being present in an amount relative to the amount of said oxygen absorber, such that when the liquid accelerator and oxygen absorber are brought into contact the oxygen absorber is capable of reducing the oxygen content of a predetermined volume containing about 2 vol. % oxygen to less than 0.5 vol. % oxygen at a temperature of about 34°F in no more than 90 minutes after said accelerator and oxygen absorber are brought into contact.

56. An oxygen scavenging packet of claim 55, wherein said oxygen absorber of (b) further comprises silica gel and a carbon dioxide generator .

57. An oxygen scavenging packet of claim 55 or 56, wherein said oxygen uptake accelerator further comprises a salt .

58. An oxygen scavenging packet of claim 55, 56 or 57, wherein said oxygen uptake accelerator further comprises an acid.

59. An oxygen scavenging packet of any one of claims 55 to 58, wherein said oxygen uptake accelerator is contained within an enclosed space within said packet .

60. An oxygen scavenging packet of any one of claims 55 to 59, wherein said iron is electrolytically annealed and reduced.

61. An oxygen scavenging packet of claim 55, wherein said oxygen uptake accelerator is contained within a bibulous wick, said wick extending from the exterior of said packet into the interior of said packet . INTELLECTUAL PROPERTY

OFFICE OF N.Z.

21 23 NOV 2001

RECEIVED

2. A method of reducing the oxygen concentration in an enclosed space comprising:

a. placing an oxygen scavenging packet within said enclosed space, said oxygen scavenging packet comprising:

1. an oxygen permeable material formed into a closed packet, and

11. an oxygen absorber within said closed packet, said oxygen absorber comprising iron;

b. introducing a liquid oxygen uptake accelerator comprising water directly onto said oxygen absorber, wherein said liquid oxygen uptake accelerator is introduced in an amount relative to the amount of said oxygen absorber, such that when the oxygen uptake accelerator and oxygen absorber are brought into contact, the oxygen absorber is capable of reducing the oxygen content of a predetermined volume containing about 2 vol. % oxygen to less than 0 5 vol. % oxygen at a temperature of about 34°F in no more than 90 minutes after said oxygen uptake accelerator and oxygen absorber are brought into contact.

63. A method of claim 62, wherein said oxygen absorber further comprises silica gel and a carbon dioxide generator.

64 A method of claim 62 or 63, wherein said oxygen uptake accelerator further comprises a salt .

65. A method of claim 62, 63 or 64, wherein said oxygen uptake accelerator further comprises an acid.

66. A method of any one of claims 62 to 65, wherein said iron is electrolytically annealed and reduced.

67. A method of reducing the oxygen concentration in an enclosed space, substantially as herein described with reference to the accompanying drawings .

68. A oxygen scavenging packet, substantially as herein described with reference to the accompanying drawings . .

INTELLECTUAL PROPERTY OFFICE OF N.Z.

END OF CLAIMS 22 2 3 NOV 2001

R E C E I V E D