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:
Feb. 27, 1990
Filed:
Dec. 09, 1988
Applicant:
Inventor:
Richard W Lewis, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
324636 ;
Abstract
Measurement apparatus and method utilizing microwave energy. A symmetric microwave cavity is excited to oscillate in at least two identical resonant modes having substantially the same resonant frequencies but different field orientations relative to each other. A sample to be measured is caused to interact with the identical resonant modes and the difference in the frequencies of oscillation of the modes is determined in order to measure a property of the sample.
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Lewis, Richard. (1990). Measurement apparatus and method utilizing multiple resonant modes of (U.S. Patent No. 4904928). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4904928
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