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:
Oct. 12, 1982
Filed:
Jun. 25, 1979
Applicant:
Inventors:
Michael T Gale, Wettswil, CH;
James Kane, Zumikon, CH;
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
3501 / ; 350311 ; 350320 ; 430321 ; 430323 ; 430325 ;
Abstract
The recording blank comprises a substrate having a non-etchable surface which incorporates a given surface relief pattern diffractive structure, an etchable metal overcoating in contact with the diffractive structure which overcoating has a smooth exterior surface, and a photoresist layer in contact with this smooth exterior surface. This permits a simple technique to be employed in fabricating a high quality embossing master.