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. 23, 2002
Filed:
Dec. 05, 1996
Raymond Clarke, Los Altos, CA (US);
Ray F. Stewart, Redwood City, CA (US);
Valentine Y. Yoon, Santa Barbara, CA (US);
Donald A. Schultz, San Mateo, CA (US);
Bradley McClary, Elkton, MD (US);
Landec Corporation, Menlo Park, CA (US);
Abstract
Novel gas-permeable membranes which are particularly useful in the packaging of fresh cut fruit and vegetables, and other respiring biological materials. The membranes have an O permeability of at least 775,000 ml/m .atm.24 hrs, a P ratio of at least 1.3, and a ratio of CO permeability to O permeability (R) of at least 1.5, and are made by forming thin polymeric coatings on microporous polymeric films. Preferred coating polymers are side chain crystalline polymers. Preferred microporous films contain inorganic fillers, particularly such films based on ultrahigh molecular weight polyetheylene or polypropylene. FIG. illustrates how O permeability an R ratio vary for different coating polymers and microporous films.