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:
Jul. 30, 1996
Filed:
Jan. 18, 1995
Applicant:
Inventors:
Robert E Hefner, Jr, Lake Jackson, TX (US);
Jimmy D Earls, Lake Jackson, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
544 96 ; 544376 ; 544333 ; 544182 ; 544179 ; 546153 ; 546155 ; 546168 ; 546170 ; 546173 ; 548218 ; 548151 ; 5483044 ; 549242 ; 549370 ; 549 22 ; 549 14 ; 549 30 ; 549 60 ;
Abstract
Anhydride compounds which contain at least one rodlike mesogenic moiety and at least two anhydride groups per molecule, wherein each of said aromatic anhydride groups is linked to the mesogen via an ester linkage are prepared. These anhydride compounds are useful in curing epoxy resins to provide the cured products with one or more improved properties.