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:
May. 30, 2006
Filed:
Oct. 10, 2003
Norberto Silvi, Clifton Park, NY (US);
Mark Howard Giammattei, Selkirk, NY (US);
Paul Edward Howson, Latham, NY (US);
Farid Fouad Khouri, Clifton Park, NY (US);
Norberto Silvi, Clifton Park, NY (US);
Mark Howard Giammattei, Selkirk, NY (US);
Paul Edward Howson, Latham, NY (US);
Farid Fouad Khouri, Clifton Park, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method for preparing a polyimide includes introducing a mixture of an oligomer and a solvent to an extruder, removing solvent via at least one extruder vent, and melt kneading the oligomer to form a polyimide. The polyimide has a low residual solvent content. The method is faster than solution polymerization of polyimides, and it avoids the stoichiometric inaccuracies associated with reactive extrusion processes that use monomers as starting materials.