IP Library › Granted Patent US 9,579,411
Granted Patent B2
US 9,579,411 · App. 12/373,619 · Granted Feb 28, 2017

Hydrogel wound dressings exhibiting reduced fiber losses in use

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Quick Facts
Patent No.
US 9,579,411
App. No.
12/373,619
Filed
Nov 17, 2009
Granted
Feb 28, 2017
Kind
B2
Examiner
SASS, SARA A
Art Unit
3761
USPC
604/361
Abstract

A wound dressing comprising: a water-absorbent fabric comprising at least about 10 wt. % of hydrogel-forming absorbent fibers based on the dry weight of the fabric; and an adhesion-resistant, water-permeable wound contacting surface textile layer that is substantially continuously bonded to at least one surface of said fabric. The surface textile layer may be formed by surface treatment of the fabric, or by bonding a suitable textile web to the surface of the fabric.

Claims (9)

1. A wound dressing comprising:

a water-absorbent fabric comprising at least 10 wt. % of hydrogel-forming absorbent fibers based on the dry weight of the fabric; and

an adhesion-resistant, water-permeable wound contacting surface textile layer that is substantially continuously bonded to at least one surface of said fabric, wherein the fabric comprises at least 10 wt. % based on the dry weight of the fabric of substantially non-water-absorbent textile fibers and wherein the fabric comprises a mixture of the hydrogel-forming fibers and the substantially non-water-absorbent textile fibers, and wherein at least a fraction of the non-water-absorbent fibers are coated with silver.

2. A wound dressing according to claim 1 , wherein said adhesion resistant surface textile layer has been formed by treating a surface layer of the fabric with a lubricant.

3. A wound dressing according to claim 2 , wherein the lubricant comprises a silicone compound or a fluorocarbon.

4. A wound dressing according to claim 2 , wherein the lubricant comprises a substance selected from the group consisting of medically acceptable lipids, mineral oils, mucopolysaccharides, and mixtures thereof.

5. A wound dressing according to claim 1 , wherein said adhesion resistant surface layer comprises a nonwoven textile web having a basis weight of from 2 to 100 g/m 2 that is continuously bonded to said surface of the fabric.

6. A wound dressing according to claim 5 , wherein said nonwoven textile web comprises thermofusible fibers, and the textile web has been bonded to the water-absorbent textile web by melt bonding.

7. A wound dressing according to claim 1 , which is sterile and packaged in a microorganism-impermeable container.

Assignments (18)
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Nov 7, 2019
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: KCI USA, INC.; KCI LICENSING, INC.
Reel/Frame 050966/0547 →
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Nov 6, 2019
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: KINETIC CONCEPTS, INC.; KCI USA, INC.; ACELITY L.P. INC.; CHIRON HOLDINGS, INC.; CHIRON TOPCO, INC.; KCI ANIMAL HEALTH, LLC; KCI HOLDING COMPANY, INC.; KCI HOMECARE, INC.; KCI IMPORTS, INC.; KCI INTERNATIONAL, INC.; KCI LICENSING, INC.; KCI PROPERTIES LIMITED; KCI REAL HOLDINGS, L.L.C.; KCI REAL PROPERTY LIMITED; KCI USA REAL HOLDINGS, L.L.C.; TECHNIMOTION, LLC
Reel/Frame 050945/0278 →
RELEASE OF SECURITY INTEREST Recorded Oct 11, 2019
From: BANK OF AMERICA, N.A.
To: KCI USA, INC.
Reel/Frame 050710/0955 →
RELEASE OF SECURITY INTEREST REEL/FRAME 040098/0268 Recorded Feb 8, 2017
From: WILMINGTON TRUST
To: KCI USA, INC.
Reel/Frame 041666/0320 →
SECURITY AGREEMENT Recorded Feb 7, 2017
From: KCI USA, INC., AS GRANTOR
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 041650/0013 →
RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY Recorded Feb 6, 2017
From: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
To: KCI LICENSING, INC., AS GRANTOR; TECHNIMOTION, LLC, A DELAWARE LIMITED LIABILITY COMPANY, AS GRANTOR; SYSTAGENIX WOUND MANAGEMENT (US), INC., A DELAWARE CORPORATION, AS GRANTOR
Reel/Frame 041395/0044 →
LIMITED THIRD LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Oct 7, 2016
From: KCI USA, INC.; LIFECELL CORPORATION; KCI LICENSING, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 040291/0237 →
SECOND LIEN SECURITY AGREEMENT Recorded Sep 21, 2016
From: KCI USA, INC.; LIFECELL CORPORATION; KCI LICENSING, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 040098/0268 →
SECURITY INTEREST Recorded Feb 17, 2016
From: KINETIC CONCEPTS, INC.; KCI USA, INC.; ACELITY L.P. INC.; CHIRON HOLDINGS, INC.; CHIRON TOPCO, INC.; KCI ANIMAL HEALTH, LLC; KCI HOLDING COMPANY, INC.; KCI HOMECARE, INC.; KCI IMPORTS, INC.; KCI INTERNATIONAL, INC.; KCI LICENSING, INC.; KCI PROPERTIES LIMITED; KCI REAL HOLDINGS, L.L.C.; KCI REAL PROPERTY LIMITED; KCI USA REAL HOLDINGS, L.L.C.; LIFECELL CORPORATION; TECHNIMOTION, LLC
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 037845/0497 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 4, 2015
From: SYSTAGENIX WOUND MANAGEMENT IP CO. B.V.
To: KCI USA, INC.
Reel/Frame 035789/0555 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 26, 2015
From: PIGG, WILLIAM; STEDMAN, MARGARET; ADDISON, DEBORAH; BAYLIFF, SIMON WILLIAM; CULLEN, BREDA MARY; LOWING, PAUL HOWARD; DELBONO, MICHELLE; JOHNSON & JOHNSON MEDICAL LIMITED
To: ETHICON, INC.
Reel/Frame 035711/0366 →
MERGER AND CHANGE OF NAME Recorded May 11, 2015
From: SYSTAGENIX WOUND MANAGEMENT (US),INC.; KCI USA, INC.
To: KCI USA, INC.
Reel/Frame 035645/0178 →
MERGER AND CHANGE OF NAME Recorded Feb 11, 2015
From: SYSTAGENIX WOUND MANAGEMENT (US), INC.; KCI USA, INC.
To: KCI USA, INC.
Reel/Frame 034954/0870 →
SECURITY AGREEMENT Recorded Oct 29, 2013
From: SYSTAGENIX WOUND MANAGEMENT (US), INC.
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 031508/0011 →
RELEASE OF SECURITY INTEREST Recorded Oct 28, 2013
From: J.P. MORGAN EUROPE LIMITED
To: SYSTAGENIX WOUND MANAGEMENT (US), INC.
Reel/Frame 031506/0186 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 21, 2010
From: ETHICON, INC.; JOHNSON & JOHNSON; JOHNSON & JOHNSON MEDICAL LIMITED; JOHNSON & JOHNSON MEDICAL B.V.; JANSSEN PHARMACEUTICA N.V.; CILAG AG; CILAG HOLDING AG; JEVCO LIMITED
To: SYSTAGENIX WOUND MANAGEMENT (US), INC.; SYSTAGENIX WOUND MANAGEMENT IP CO. B.V.
Reel/Frame 024563/0368 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 21, 2010
From: ETHICON, INC.; JOHNSON & JOHNSON MEDICAL LIMITED
To: SYSTAGENIX WOUND MANAGEMENT IP CO. B.V.
Reel/Frame 024563/0344 →
SECURITY AGREEMENT Recorded Nov 2, 2009
From: SYSTAGENIX WOUND MANAGEMENT (US)
To: J.P. MORGAN EUROPE LIMITED
Reel/Frame 023458/0547 →