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:
Apr. 07, 1992
Filed:
Sep. 25, 1989
Applicant:
Inventor:
Ronald F Sieloff, Evansville, IN (US);
Assignee:
General Electric Company, Pittsfield, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; G02F / ; G02F / ; F21V / ;
U.S. Cl.
CPC ...
359253 ; 359 96 ; 359 93 ; 359361 ;
Abstract
A multilayered security window structure employs an electrically operated optical shutter disposed between protective outer polycarbonate layers. The outer polycarbonate layers protect the optical shutter from impact and from ultraviolet radiation degradation. The structure is useful as a security window in prisons and may be electrically operated to control the transmission of light therethrough.