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:
Jun. 27, 2000
Filed:
Nov. 03, 1998
Robert F Rainville, North Andover, MA (US);
Anne G Rowlands, Honeoye Falls, NY (US);
Deborah J Burrows, Rochester, NY (US);
Peter Noble, Macclesfield, GB;
Eastman Kodak Company, Rochester, NY (US);
Abstract
The present invention is a gelatin composed of a high molecular weight fraction (>250,000) of from 0 to 25 wt %, a beta fraction (150,000-250,000) of from 0 to 20 wt % and an alpha fraction (50,000-150,000) of from 15 to 55 wt %. The gelatin has a Gel strength of from 150 to 350 g Bloom and a concentration of protease of greater than 10 ppb and an absorbance of at least 0.069 at 420 nm. The present invention also is a process for the manufacture of photographic gelatin. The process begins by liquefying or slurrying the residual ossein. Protease is added to the gelatin solution or ossein slurry to a concentration of at least 10 ppb to form a mixture. The mixture is reacted for a time sufficient to achieve a viscosity of less than 9 cps (6.16% gel concentration at 104.degree. F.) and the protease is inactivated. The mixture is clarified to form a gelatin solution wherein the gelatin is of high quality.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile