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. 17, 1982
Filed:
Jan. 16, 1981
Applicant:
Inventor:
Charles W Wyckoff, Needham, MA (US);
Assignee:
The Academy of Applied Science, Inc., Belmont, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430364 ; 430366 ; 430373 ; 430393 ;
Abstract
A process is disclosed for enhancing the speed of both certain black and white and color films, through initial black-and-white development, and redevelopment with color coupling developers and color coupling dye units, and replacement of silver units with multiple color dye units for each silver unit that provide a color image enhanced over that provided by the silver image.
Wyckoff, Charles. (1982). Process for increasing the effective speed of photographic films and (U.S. Patent No. 4345023). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4345023
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile