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. 24, 2012
Filed:
Nov. 07, 2006
Edward George Howard, Jr., Hockessin, DE (US);
Ralph Birchard Lloyd, Fayetteville, NC (US);
Ronald James Mckinney, Wilmington, DE (US);
Bryan Benedict Sauer, Boothwyn, PA (US);
Mark Gary Weinberg, Wilmington, DE (US);
Edward George Howard, Jr., Hockessin, DE (US);
Ralph Birchard Lloyd, Fayetteville, NC (US);
Ronald James McKinney, Wilmington, DE (US);
Bryan Benedict Sauer, Boothwyn, PA (US);
Mark Gary Weinberg, Wilmington, DE (US);
E I du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Processes for fabricating selectively permeable laminates are provided. In one process, continuous chitosan film is prepared by casting a chitosan solution directly onto a substrate that will be incorporated along with the film into a laminate. Alternatively, the chitosan solution is cast onto a work device (for example, such as glass or a polymer film), dried, detached, and then incorporated into a laminate in a separate step. In various embodiments, the laminates are useful for fabrication as a protective article and are substantially impermeable to hazardous chemical and biological agents, but sufficiently permeable to water vapor that, if worn as protective apparel, it is both protective and comfortable to wear.