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. 25, 1986
Filed:
Oct. 20, 1983
Applicant:
Inventors:
Leslie E Lawson, Surbiton, GB;
Michael Ingham, Bramley, GB;
Assignee:
Vickers PLC, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03D / ; G03D / ;
U.S. Cl.
CPC ...
354299 ; 354320 ; 354324 ; 354328 ; 118689 ;
Abstract
Changes occurring in the electrical conductivity of liquids used to process image-wise exposed radiation-sensitive devices are used as a measure of the deterioration in effectiveness of the liquids. This deterioration is compensated for by varying the processing conditions, such as temperature, time, scrubbing action and processing liquid composition, in accordance with the change in conductivity.
Lawson, Leslie. (1986). Method and apparatus for controlling the processing of radiation (U.S. Patent No. 4577948). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4577948
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile