The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2015
Filed:
Apr. 01, 2011
Applicants:
Ollivier Pujol, Lausanne, CH;
Isabelle Rigot, La Balme de Sillingy, FR;
Inventors:
Ollivier Pujol, Lausanne, CH;
Isabelle Rigot, La Balme de Sillingy, FR;
Assignee:
Rolex S.A., Geneva, CH;
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/111 (2006.01); C04B 35/626 (2006.01); C04B 35/634 (2006.01); C04B 35/645 (2006.01);
U.S. Cl.
CPC ...
C04B 35/111 (2013.01); C04B 35/6261 (2013.01); C04B 35/63488 (2013.01); C04B 35/6455 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3227 (2013.01); C04B 2235/3232 (2013.01); C04B 2235/3239 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/3262 (2013.01); C04B 2235/3272 (2013.01); C04B 2235/3275 (2013.01); C04B 2235/3279 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/652 (2013.01); C04B 2235/656 (2013.01); C04B 2235/6582 (2013.01); C04B 2235/661 (2013.01); C04B 2235/77 (2013.01); C04B 2235/786 (2013.01); C04B 2235/96 (2013.01); C04B 2235/9661 (2013.01);
Abstract
The invention relates to an alumina-based opaque ceramic, similar to ruby and having a high toughness. This ceramic comprises, by weight: 0.4% to 5% of at least from one oxide of a metal chosen from chromium, cobalt, nickel, manganese, vanadium, titanium and iron; 0.00080 to 0.5% of magnesium oxide; and 0.05 to 6% of at least one oxide of an element of the group of rare earths. The ceramic is applicable in particular in jewelry, fine jewelry and watch making. The invention also relates to methods of preparing such a ceramic.