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:
Aug. 22, 1978
Filed:
Mar. 25, 1977
Applicant:
Inventors:
Michael Thomas Gale, Wettswil, CH;
James Kane, Zumikon, CH;
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
96 382 ; 96 36 ; 96 383 ;
Abstract
A recording blank, composed of at least one diffraction grating substrate, such as nickel, covered with a layer of photoresist is used to produce an embossing master by exposing the photoresist to picture information composed of respective white and non-white manifesting regions; developing the exposed photoresist to reveal the grating portions underlying solely the white manifesting regions; electroplating and/or etching the revealed portions to level and obliterate the revealed grating portions, and then removing the remainder of the photoresist.