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:
Jan. 04, 2000
Filed:
May. 12, 1997
Yoshinari Kashiwagi, Neyagawa, JP;
Makoto Umetani, Izumi, JP;
Hidenao Kataoka, Hirakata, JP;
Kenji Inoue, Nishinomiya, JP;
Shoji Nakamura, Hirakata, JP;
Satoru Morimoto, Tondabayashi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A die for press-molding glass optical elements comprising (a) a base material having heat resistance and sufficient strength to withstand press-molding of optical glass elements; (b) a film on said base material comprising an alloy film containing B and one metal selected from the group consisting of Ni, Co, and Fe, and one metal selected from the group consisting of Si, Ti, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Re, Os, and Ir, to form a cutting layer; and (c) a surface protective layer on top of said cutting layer made of an alloy film comprising at least one metal selected from the group consisting of Pt, Pd, Ir, Rh, Os, Ru, Re, W, and Ta.