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:
Aug. 01, 1978
Filed:
Oct. 06, 1976
Applicant:
Inventor:
Ludwig G Wolfert, Littleton, CO (US);
Assignee:
Martin Marietta Corporation, Rockville, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01T / ;
U.S. Cl.
CPC ...
250370 ; 250255 ; 250364 ;
Abstract
There is provided an improved radon-222 detector device for counting alpha particles originating from radon-222 gas including an alpha particle permeable window in one end of a body and a surface barrier type semiconductor detector adjacent thereto and spaced from the window, and characterized by a moisture attenuating means adjacent the window and the detector.