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:
Oct. 05, 1976
Filed:
Jun. 27, 1974
Applicant:
Inventor:
J Michael Grasshoff, Hudson, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260577 ; 260574 ; 260575 ;
Abstract
A process of forming a dye mordant precursor for a photographic system by reacting a p-amino phenethyl alcohol with a trialkyl phosphate at a controlled temperature, and dehydrating the resultant p-dialkyl amino phenethyl alcohol with a strong alkali in the presence of a polymerization inhibitor.