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:
Mar. 22, 2005
Filed:
Oct. 30, 2001
Applicants:
Douglas S. Hobbs, Lexington, MA (US);
James J. Cowan, Lexington, MA (US);
Inventors:
Douglas S. Hobbs, Lexington, MA (US);
James J. Cowan, Lexington, MA (US);
Assignee:
Coho Holdings LLC, Lexington, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N021/25 ; G01N021/47 ;
U.S. Cl.
CPC ...
Abstract
An apparatus for filtering electromagnetic waves, the apparatus comprising a substrate having a surface relief structure containing at least one dielectric body with physical dimensions smaller than the wavelength of the filtered electromagnetic waves, such structures repeated in a two dimensional array covering at least a portion of the surface of the first substrate. Also disclosed is a material sensor utilizing this apparatus.