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:
Nov. 24, 2009
Filed:
Aug. 07, 2007
John F. Dain, Hollister, CA (US);
Elizabeth L. Dain, Hollister, CA (US);
Nicholas J. Henneman, Hollister, CA (US);
John F. Dain, Hollister, CA (US);
Elizabeth L. Dain, Hollister, CA (US);
Nicholas J. Henneman, Hollister, CA (US);
Other;
Abstract
An ultra low temperature freezer is optimized with a combination of vacuum and fiberglass insulation for long-term biological storage with accurate process cooling with critical temperature performance. A programmable cooling and cryogenic freezing system uses sealed liquid nitrogen for cooling and freezing. A hybrid completely non-mechanical system exhibits temperature uniformity and reliability, saves space, requires extremely low operating energy and minimizes need for air conditioning in the operating environment. Top-located components control the flow of liquid nitrogen even under flooding conditions. Sectioned inner doors mitigate thermal transfer to other samples and maintain ULT while accessing the freezer.