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:
Oct. 23, 2001
Filed:
Mar. 17, 2000
Applicant:
Inventor:
Norman B. Rainer, Richmond, VA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 3/26 ;
U.S. Cl.
CPC ...
B32B 3/26 ;
Abstract
A composite porous structure includes a macroporous open-pore sponge of regenerated cellulose having disposed within the pores a microporous polyvinyl chloride (PVC) substrate. The total empty space of the structure, produced by the pores, is between 60% and 92% of the outer envelope geometrical volume of the structure. The wet compressive strength of the structure is at least ten times greater than the wet compressive strength of the cellulose sponge without the PVC.