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, 1990
Filed:
Jan. 20, 1988
Daniel J Brunelle, Scotia, NY (US);
Thomas L Guggenheim, Scotia, NY (US);
James A Cella, Clifton Park, NY (US);
Thomas L Evans, Clifton Park, NY (US);
Luca P Fontana, Clifton Park, NY (US);
Gary R Faler, Scotia, NY (US);
James M Fukuyama, Clifton Park, NY (US);
Eugene P Boden, Scotia, NY (US);
Jonathan D Rich, Rexford, NY (US);
Thomas G Shannon, Evansville, IN (US);
Sharon J McCormick, Schenectady, NY (US);
Philip J McDermott, Clifton Park, NY (US);
Alice M Colley, Latham, NY (US);
Joseph W Guiles, Ft. Collins, CO (US);
General Electric Company, Schenectady, NY (US);
Abstract
Macrocyclic oligomers, including polycarbonates, polyesters, polyamides, polyimides, polyetherketones and polyethersulfones, are conveniently prepared from various spiro(bis)indane compounds, especially the 6,6'-difunctional 3,3',3'-tetramethylspiro(bis)indanes. The macrocyclic oligomers may be conveniently converted to linear polymers.