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:
Nov. 11, 2003
Filed:
Dec. 10, 1999
Lewis Sidney Miller, Rugby, GB;
David John Walton, Coventry, GB;
Andrew Martin McRoberts, Rugby, GB;
Andrew Laurence Newton, Birmingham, GB;
David Anthony Parry, Warley, GB;
Christopher G.D. Sykesud, Sutton Coldfield, GB;
Coventry University, Coventry, GB;
Abstract
An optical sensor for detection of gases such as nitrogen oxides includes a thin film of an active material comprising a highly polarisable organic material deposited by the Langmuir-Blodgett technique or otherwise on a substrate and interrogated optically, to detect changes in at least one optical property such as reflectance or complex refractive index. Preferred materials include a specific polysiloxane and low-molecular-mass compounds (FIGS to ), having specific electron donating and/or accepting groups, including azobenzenes. The optical change may include a visible colour change.