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. 20, 1991
Filed:
Nov. 07, 1989
Frank H Attix, Madison, WI (US);
Radiation Measurements, Inc., Madison, WI (US);
Abstract
An ion chamber for use with analysis and alignment of radiation therapy equipment is disclosed which includes a one millimeter deep ion chamber formed by a cavity in the front of a core member which is closed at its upper end by a thin electrode stretched and held in place over the cavity. A guard ring around the collecting electrode is maintained by a coated layer formed on the surface of the core inside of the cavity. Suitable conductive layers applied to the core connect to the various conductors of a triaxial cable so that the front electrode, the ion collecting electrode, and the guard ring electrode, can all be relatively easily connected to the single triaxial cable connected to the ion chamber. Components of the ion chamber are all, with the exception of the front electrode and the ion collecting electrode, fabricated of a single uniform material having known and defined radiation transmission properties so that radiation field discontinuities and perturbations are not generated within the instrument.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile