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:
Nov. 04, 1980
Filed:
Sep. 23, 1977
Applicant:
Inventors:
Stanley M Bloom, Waban, MA (US);
Alan L Borror, Lexington, MA (US);
James W Foley, Andover, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C09B / ;
U.S. Cl.
CPC ...
2602433 ; 544 33 ; 544 62 ; 544 95 ; 544133 ; 544135 ; 544368 ; 544 585 ; 546 94 ; 546198 ; 548207 ;
Abstract
This invention relates to phenol sulfam(na)phthaleins possessing a 2-(2'-halomethylbenzoyl) group substituted on the N atom of the sulfam(na)phthalein ring, which compounds find utility as photographic optical filter agents and filter agent precursors.