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:
Jan. 12, 1993
Filed:
Dec. 19, 1990
Applicant:
Inventors:
Edward J Balthazar, Sissonville, WV (US);
Harold E Bellis, Wilmington, DE (US);
Charles J Denham, Charleston, WV (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
562587 ; 562517 ;
Abstract
A process for solubilizing solid formaldehyde oligomers without contaminating the solution product with undesirable solvent products by treating the oligomer with heated hydroxyacetic acid.