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:
Jun. 08, 1993
Filed:
Sep. 23, 1992
Applicant:
Inventor:
Donald B Parrish, Lake Jackson, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08V / ;
U.S. Cl.
CPC ...
521114 ; 521170 ; 521174 ; 524751 ; 528 48 ; 568701 ;
Abstract
6-chromanol derivatives are used as antioxidants in polyethers. These, particularly in conjunction with other antioxidants, provide excellent protection against oxidation at very low levels of use. They are particularly useful in polyethers for preparing polyurethane slabstock foam.