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:
May. 12, 1998
Filed:
Apr. 04, 1997
Gerard M Ludtka, Oak Ridge, TN (US);
Thomas G Kollie, Oak Ridge, TN (US);
David C Watkin, Clinton, TN (US);
David G Walton, Knoxville, TN (US);
Lockheed Martin Energy Research Corporation, Oak Ridge, TN (US);
Abstract
Method and apparatus for measuring the permeability of polymer film materials such as used in super-insulation powder-filled evacuated panels (PEPs) reduce the time required for testing from several years to weeks or months. The method involves substitution of a solid non-outgassing body having a free volume of between 0% and 25% of its total volume for the usual powder in the PEP to control the free volume of the 'body-filled panel'. Pressure versus time data for the test piece permit extrapolation to obtain long term performance of the candidate materials.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile