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:
Jul. 13, 1993
Filed:
Nov. 20, 1991
Applicant:
Inventors:
Donald A McGowan, Bedford, MA (US);
Mark R Mischke, Arlington, MA (US);
Stephen J Telfer, Arlington, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
549404 ; 549415 ; 549408 ; 549398 ; 549220 ; 549218 ; 549 28 ; 549 23 ; 549 13 ; 549-5 ; 548525 ; 548517 ; 548454 ; 546207 ; 546196 ; 546 66 ; 544151 ; 544149 ; 544145 ; 540-1 ;
Abstract
Squarylium compounds of the formula: ##STR1## in which: Q.sup.1 and Q.sup.2 are each a Chromophoric group having an unsaturated system conjugated with the squarylium ring and such that in the compounds of formulae Q.sup.1 CH.sub.2 R.sup.1 and Q.sup.2 CH.sub.2 R.sup.2 the methylene hydrogens are active hydrogens;