WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1998052774) DIAMOND MARKING
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1998/052774    International Application No.:    PCT/GB1998/001497
Publication Date: 26.11.1998 International Filing Date: 22.05.1998
Chapter 2 Demand Filed:    21.12.1998    
IPC:
B44B 7/00 (2006.01)
Applicants: GERSAN ESTABLISHMENT [LI/LI]; Aeulestrasse 5, FL-9490 Vaduz (LI) (For All Designated States Except US).
SMITH, James, Gordon, Charters [GB/GB]; (GB) (For US Only).
STEWART, Andrew, David, Garry [GB/GB]; (GB) (For US Only)
Inventors: SMITH, James, Gordon, Charters; (GB).
STEWART, Andrew, David, Garry; (GB)
Agent: WALDREN, Robin, Michael; Marks & Clerk, 57-60 Lincoln's Inn Fields, London WC2A 3LS (GB)
Priority Data:
9710738.7 23.05.1997 GB
9727365.0 24.12.1997 GB
Title (EN) DIAMOND MARKING
(FR) PROCEDE DE GRAVURE SUR DIAMANT
Abstract: front page image
(EN)An information mark invisible to the naked eye is applied to the polished facet of a diamond gemstone by coating the diamond gemstone surface with an electrically conductive layer so as to prevent the diamond becoming charged, forming the mark with a focused ion beam, and cleaning the diamond surface with a powerful oxidizing agent to reveal a mark having an appropriate depth, which does not detrimentally affect the clarity or colour grade of the diamond.
(FR)On forme une gravure indicative, invisible à l'oeil nu, sur la facette polie d'un diamant, en revêtant la surface de ce diamant d'une couche électriquement conductrice, de manière à prévenir tout chargement dudit diamant, puis en gravant au moyen d'un faisceau électronique focalisé, et en nettoyant la surface du diamant au moyen d'un agent fortement oxydant, afin de révéler ladite gravure, de profondeur adéquate, qui ne nuit pas au degré de pureté ou à la couleur dudit diamant.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)