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. 09, 1978
Filed:
May. 07, 1975
Louis L Wood, Rockville, MD (US);
Jerome L Murray, New York, NY (US);
Frances R Gardiner, Sparta, NJ (US);
W. R. Grace & Co., New York, NY (US);
Abstract
A hydrophilic polyurethane foam for use in a catamenial device such as a tampon is disclosed which can be compressed to less than about 50 percent of its original dry volume, stored in such condition for an extended period of time, and later rapidly re-expanded to at least its dry volume. Prior to compression, the foam is impregnated with a solid inorganic release agent, which is located within the cells of the foam and maintains the separation of the cell walls. Adherence of contiguous cell walls is prevented and the rapid re-expansion of the foam upon contact with moisture or water is thereby facilitated.