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:
Aug. 21, 1979
Filed:
May. 31, 1978
Applicant:
Inventor:
Jerome R Bodmer, Appleton, WI (US);
Assignee:
NCR Corporation, Dayton, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41L / ; B41M / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
282 275 ; 260 293 ; 428307 ; 428327 ; 528162 ; 525504 ; 525506 ; 525936 ;
Abstract
A method of making zinc-modified phenol-aldehyde novolak resins for use as a color-developing agent in pressure-sensitive record sheet material involving the addition of certain dry particulate zinc compounds and an ammonium carboxylate to the melted resin. Specifically, a phenol-formaldehyde resin is reacted with zinc oxide or zinc carbonate and ammonium benzoate.