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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.:

US 10137219 B1

PDFFull Text
Date of Patent:
Nov. 27, 2018

Filed:

Aug. 04, 2014

Coherent blood coagulation structure of water-insoluble chitosan and water-dispersible starch coating

Applicant:

James F. Drake, Minneapolis, MN (US);

Inventor:

James F. Drake, Minneapolis, MN (US);

Assignee:

Other;

Attorney:

Mark A. Litman & Assoc, P.A.

Primary Examiner:

Jacqueline Stephens

Int. Cl.
CPC ...
A61L 15/28 (2006.01); A61L 15/42 (2006.01); B32B 5/02 (2006.01); B32B 5/14 (2006.01); B32B 5/22 (2006.01); B32B 5/26 (2006.01); B32B 9/02 (2006.01); B32B 9/04 (2006.01); B32B 27/12 (2006.01); B32B 27/28 (2006.01); B32B 27/32 (2006.01); B32B 27/40 (2006.01);
U.S. Cl.
CPC ...
A61L 15/28 (2013.01); A61L 15/42 (2013.01); A61L 15/425 (2013.01); B32B 5/02 (2013.01); B32B 5/022 (2013.01); B32B 5/145 (2013.01); B32B 5/22 (2013.01); B32B 5/26 (2013.01); B32B 9/02 (2013.01); B32B 9/047 (2013.01); B32B 27/12 (2013.01); B32B 27/283 (2013.01); B32B 27/32 (2013.01); B32B 27/322 (2013.01); B32B 27/40 (2013.01); A61L 2400/04 (2013.01); B32B 2255/02 (2013.01); B32B 2255/26 (2013.01); B32B 2262/06 (2013.01); B32B 2307/726 (2013.01); B32B 2307/728 (2013.01); B32B 2535/00 (2013.01);
Abstract

An absorbent layer for moderating blood flow from a wound has a non-woven fabric layer of water-insoluble chitosan fibers having a coating of water-absorbent starch on at least one face of the fabric layer. The coating of water-absorbent starch penetrates into the fabric layer from a first surface over the chitosan fibers to a depth of at least 25% of the fabric layer of chitosan fibers. The chitosan fibers have average diameters of from 5 to 30 micrometers. The average weight of starch/chitosan may decrease from the first surface from which the starch has penetrated into the fabric to the depth of at least 50% of the fabric layer. The starch may be modified to include hydrophilic groups into or onto molecular chains of the starch.

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