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. 22, 2014
Filed:
Apr. 19, 2013
The United States of America, As Represented BY the Secretarty of the Air Force, Washington, DC (US);
Loon-Seng Tan, Centerville, OH (US);
David Huabin Wang, Beavercreek, OH (US);
Kyung Min Lee, Dayton, OH (US);
Timothy J. White, Centerville, OH (US);
The United States of America as represented by the Secretary of the Air Force, Washington, DC (US);
Abstract
Cross-linked polyimides based on a novel crosslinker and methods of making the same. The general structure of these heat-resistant and amorphous polyimides is shown as follows: in which n, m, and l denote the degrees of polymerization (DP) of each arm and the linking group R' is one of the following moieties: —C(CF)—, —O—, —SO—, >C(═O), —OPh-C(CH)-PhO-, -(Ph)C(CF)—, or a direct bond (—). Films (cantilevers) comprising cross-linked polyimides according to the present invention demonstrate photodirected bending upon exposure to linearly polarized light.