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:
Apr. 16, 2013
Filed:
Feb. 09, 2010
Applicant:
Patrick William Retz, Witney, GB;
Inventor:
Patrick William Retz, Witney, GB;
Assignee:
Siemens Plc., Frimley, Camberley, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 15/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an apparatus and a method for detecting deposition of solid frost caused by air ingress into a cryogen vessel, a quartz crystal microbalance, that includes a crystal sensor, is placed within the cryogen vessel, and an actuating circuit actuates resonance of the crystal sensor, and detection equipment detects a change in the resonant characteristics of the crystal sensor caused by frost deposition on the crystal sensor, and signaling equipment indicates the detected change.