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:
Dec. 25, 2001
Filed:
Apr. 21, 2000
Applicant:
Inventors:
Bronwyn Glenice Laycock, Heidelberg Heights, AU;
David Geoffrey Hawthorne, Oakleigh, AU;
Jonathan Howard Hodgkin, Burwood, AU;
Trevor Charles Morton, Hampton, AU;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 7/310 ; C08G 7/314 ; C08L 7/908 ;
U.S. Cl.
CPC ...
C08G 7/310 ; C08G 7/314 ; C08L 7/908 ;
Abstract
A process for the preparation of an oligomeric polyimide comprises: mixing a tetracarboxylic acid, a dianhydride, a partially hydrolysed dianhydride or a mixture thereof with a diamine in a reaction medium comprising greater than 80% by weight water, and heating mixture in said reaction medium at a temperature above 100° C. for a time sufficient to form said oligomeric polyimide.