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:
Jun. 11, 1985
Filed:
Oct. 11, 1983
Applicant:
Inventors:
Jack C Volkers, Elgin, IL (US);
William R Conley, Elgin, IL (US);
Assignee:
Illinois Tool Works Inc., Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ; H01Q / ;
U.S. Cl.
CPC ...
428624 ; 428625 ; 428626 ; 428635 ; 428650 ; 428651 ; 428652 ; 428653 ; 428674 ; 428675 ; 428676 ; 428677 ; 428678 ; 428679 ; 428680 ; 428681 ; 428682 ; 428683 ; 428684 ; 428685 ; 428686 ; 428925 ; 428928 ; 343 / ;
Abstract
A composite structure of thin films including alternating layers of relatively high conductivity metals and low conductivity metals to combine the effects of reflection and absorption and thereby maximize the attenuation of the structure. Additionally, a similar structure of layers of materials with differing magnetic permeabilities may be used for the same purpose.