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:
Apr. 05, 1977
Filed:
Jul. 03, 1975
Applicant:
Inventors:
Silvano Fattori, San Donato Milanese, IT;
Enzo Rossi, San Donato Milanese, IT;
Luigi Imparato, Milan, IT;
Assignee:
Snam Progetti S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2606115 ; 260620 ; 2606 / ; 260592 ;
Abstract
A composition comprising a poly-alkyleneglycol is stablized against molecular degradation and viscosity loss at elevated temperatures by about 0.1 to about 10% by weight of an arylhydroquinone such as p-acetylphenylhydroquinone.