Mark T Dillon

US Patent:

20020045041, Apr 18, 2002

Filed:

Apr 30, 2001

Appl. No.:

09/845523

Inventors:

Mark Dillon - Huntingdon Valley PA, US
Richard Brandimarte - Bensalem PA, US
Raymond Triglia - Levittown PA, US

International Classification:

B32B003/26

US Classification:

428/311510, 428/315500, 428/316600

Abstract:

A microporous membrane is described comprising at least two layers, wherein each layer is characterized by nodes interconnected by fibrils, the layers are bonded by means of plastic flow at temperatures below the melting point of either membrane material, and the pore architecture is formed in situ by an expansion process. A stratified microporous membrane is produced wherein the pore architecture of each layer may be discretely controlled. The article is useful for filtration and medical applications where a pore size gradient is required.

US Patent:

49451251, Jul 31, 1990

Filed:

Jan 5, 1987

Appl. No.:

7/000389

Inventors:

Joseph A. Dillon - Huntingdon Valley PA
Mark E. Dillon - Huntingdon Valley PA

Assignee:

Tetratec Corporation - Feasterville PA

International Classification:

C08L 2718
D01D 516
D01F 102

US Classification:

527427

Abstract:

A process for producing a semi-interpenetrating polymer network of polytetrafluoroethylene and silicone elastomers is described which comprises the steps of (1) intimately blending a mixture of a major amount of unsintered and unfibrillated particulate polytetrafluoroethylene dispersion resin and minor amounts of (A) a hydrocarbon liquid and (B) an addition curable silicone composition consisting essentially of a polydiorganosiloxane having alkenyl unsaturation, an organohydrogenpoly-siloxane crosslinking agent, a catalyst for promoting crosslinking of said polysiloxane, and an inhibitor for the catalytic reaction; (2) forming said blend into an extrudable shape; (3) biaxially extruding said blend through a die into a shaped extrudate product having a randomly fibrillated structure; (4) evaporating said hydrocarbon liquid, and activating said catalyst so as to generate a cured silicone elastomer and polytetrafluoroethylene semi-interpenetrating polymer network comprising said fibrillated extrudate structure. Products produced by this process have improved physical properties as compared to extruded fibrillated polytetrafluoroethylene dispersion resin alone.

US Patent:

62353772, May 22, 2001

Filed:

Sep 5, 1995

Appl. No.:

8/523278

Inventors:

Mark E. Dillon - Huntingdon Valley PA
Richard Brandimarte - Bensalem PA
Raymond E. Triglia - Levittown PA

Assignee:

Bio Med Sciences, Inc. - Allentown PA

International Classification:

B32B 702

US Classification:

428212

Abstract:

A microporous membrane is described comprising at least two layers, wherein each layer is characterized by nodes interconnected by fibrils, the layers are bonded by means of plastic flow at temperatures below the melting point of either membrane material, and the pore architecture is formed in situ by an expansion process. A stratified microporous membrane is produced wherein the pore architecture of each layer may be discretely controlled. The article is useful for filtration and medical applications where a pore size gradient is required.

US Patent:

56562799, Aug 12, 1997

Filed:

Feb 23, 1994

Appl. No.:

8/200152

Inventors:

Mark E. Dillon - Huntingdon Valley PA

Assignee:

Bio Med Sciences, Inc. - Bethlehem PA

International Classification:

A61F 1300

US Classification:

424402

Abstract:

Elastomeric sheeting materials are described which are formed from the process of (1) creating a membrane comprising a semi-interpenetrating polymer network ("IPN") of polytetrafluoroethylene ("PTFE") and polydimethylsiloxane ("PDMS") by causing a matrix of PDMS to be formed in situ with a matrix of PTFE; (2) causing a surface of substantially pure PDMS to be formed on at least one side thereof; (3) allowing said PDMS compositions to vulcanize; and (4) converting said structure into useful shapes suitable for application to anatomical areas of the body. The product of the process is suitable for the treatment of dermatologic scars, such as those associated with traumatic or surgical injuries of the skin. The pure PDMS layer provides desired therapeutic effects. The semi-IPN membrane provides improved physical integrity, durability, and elastic behavior in comparison to prior art.

US Patent:

59809230, Nov 9, 1999

Filed:

Aug 11, 1997

Appl. No.:

8/910304

Inventors:

Mark E. Dillon - Huntingdon Valley PA

Assignee:

Bio Med Sciences, Inc. - Bethlehem PA

International Classification:

A61F 1300

US Classification:

424402

Abstract:

Elastomeric sheeting materials are described which are formed from the process of (1) creating a membrane comprising a semi-interpenetrating polymer network ("IPN") of polytetrafluoroethylene ("PTFE") and polydimethylsiloxane ("PDMS") by causing a matrix of PDMS to be formed in situ with a matrix of PTFE; (2) causing a surface of substantially pure PDMS to be formed on at least one side thereof; (3) allowing said PDMS compositions to vulcanize; and (4) converting said structure into useful shapes suitable for application to anatomical areas of the body. The product of the process is suitable for the treatment of dermatologic scars, such as those associated with traumatic or surgical injuries of the skin. The pure PDMS layer provides desired therapeutic effects. The semi-IPN membrane provides improved physical integrity, durability, and elastic behavior in comparison to prior art.

US Patent:

48320099, May 23, 1989

Filed:

Dec 23, 1987

Appl. No.:

7/137418

Inventors:

Mark E. Dillon - Southampton PA

Assignee:

Bio Med Sciences, Inc. - Amherst NY

International Classification:

A61L 1500

US Classification:

128156

Abstract:

An improved bandage comprises a backing sheet constructed of a semi-interpenetrating polymer network. Use of a semi-interpenetrating polymer network allows for an extremely desirable combination of gas permeability and hydrostatic resistance. This construction of backing sheet provides for suitable vapor permeability and sufficient water impermeability because the pores therein are of a colloidal size range and the surface tension thereof results in the backing material being hydrophobic.