Leonard James Harvey, Age 7214545 N Blazing Canyon Dr, Tucson, AZ 85755

6861466, Mar 1, 2005

Jan 20, 2004

10/761086

Michael C. Dadalas - Eggenfelden, DE
Leonard W. Harvey - Downingtown PA, US

3M Innovative Properties Company - St. Paul MN

C08J003/00

524544, 526242, 526248, 526250, 526805, 524805

In an aspect of the invention, a fluoropolymer dispersion, preferably a PTFE dispersion, is provided that comprises fluoropolymer particles having an average particle size of 10 to 400 nm dispersed in water whereby the dispersion has an amount of solids between 35 and 70% by weight. The dispersion is free of fluorinated surfactant having a molecular weight of less than 1000 g/mol (hereinafter called low molecular weight fluorinated surfactant) or contains the low molecular weight fluorinated surfactant in an amount of not more than 0. 05% by weight based on the total weight solids of the dispersion. The dispersion further comprises a non-ionic non-fluorinated surfactant or mixture of non-ionic non-fluorinated surfactants and one or more non-fluorinated anionic surfactants. Through the use of a non-fluorinated anionic surfactant, a dispersion is obtained that has a low viscosity at room temperature (20 C. ). The dispersion is further free of aromatic group containing non-ionic surfactants and is accordingly environmentally more friendly and can yield coatings that are less susceptible of discoloration.

7279522, Oct 9, 2007

Aug 6, 2002

10/486860

Michael C. Dadalas - Eggenfelden, DE
Rebekka Epsch - Berlin, DE
Friedrich Kloos - Mainz, DE
Leonard W. Harvey - Downingtown PA, US

3M Innovative Properties Company - St. Paul MN

C08L 27/12

524544, 528502 A

The present invention provides a fluoropolymer dispersion comprising fluoropolymer particles having an average particle size of 10 to 400 nm dispersed in water whereby the dispersion is free of fluorinated surfactant having a molecular weight of less than 1000 g/mol or contains the fluorinated surfactant having a molecular weight of less than 1000 g/mol in an amount of not more than 0. 025% by weight based on the total weight of solids in the dispersion. The dispersion further comprises a non-ionic surfactant and an anionic surfactant selected from fluorinated anionic surfactants having a molecular weight of at least 1000 g/mol, non-fluorinated anionic surfactants and mixtures thereof.

7997018, Aug 16, 2011

Sep 25, 2008

12/238024

Leonard W. Harvey - Downingtown PA, US

Lenford, Inc. - Elverson PA

D06F 75/00
D06F 75/08

38 74, 38 75

Devices and methods for applying vibrations to the iron sole of an ironing appliance to facilitate the movement of the iron sole over a fabric, thereby improving the effectiveness of the ironing appliance in removing wrinkles, especially on thicker fabrics.

8053549, Nov 8, 2011

Jul 15, 2008

12/669389

Andrew J. Melville - Cheshire, GB
Leonard W. Harvey - Downingtown PA, US
Joel Ginies - Cheshire, GB
Michael Coates - Elverson PA, US
Julie K. Wright - Cheshire, GB

Whitford Plastics Limited - Runcorn, Cheshire

C08G 6/00
C08J 3/00

528481, 4273855, 524501, 525199

A method for the preparation of a modified fluoropolymer powdered material is disclosed. A suspension of solid fluoropolymer particles together with PTFE particles in an aqueous carrier, is frozen and the frozen carrier is then removed by sublimation at sub-atmospheric pressure to produce a dry powder of modified fluoropolymer particles.

8227548, Jul 24, 2012

Sep 25, 2009

12/567330

Leonard W. Harvey - Downingtown PA, US
Lawrence D. Leech - West Chester PA, US

Whitford Corporation - Elverson PA

C08L 27/02
C08F 214/26
C08F 214/08
C08G 75/02

525199, 525200, 524519, 524520

A fluoropolymer coating composition that may be applied over a primer and/or at least one midcoat in a non-stick coating system. The coating composition may be prepared and applied in the form of a liquid dispersion, and includes at least one fluoropolymer base component, such as polytetrafluoroethylene (PTFE) and, in particular, at least one high molecular weight PTFE (HPTFE). The coating composition additionally includes a blended fluoropolymer composition. The blended fluoropolymer composition is a blend of at least one low molecular weight PTFE (LPTFE) and at least one melt-processible fluoropolymer. After application directly to a substrate or over an underlying coating, the coating demonstrates improved abrasion and scratch resistance, as well as improved release characteristics, as compared to known coatings that include only HPTFE or HPTFE with a small amount of melt processible fluoropolymer.

8349434, Jan 8, 2013

Mar 2, 2012

13/410357

Leonard W. Harvey - Downingtown PA, US
Lawrence D. Leech - West Chester PA, US

Whitford Corporation, Inc. - Elverson PA

D06N 7/04
G11B 5/64
C08L 27/14

428141, 525199

A fluoropolymer coating composition that may be applied over a primer and/or at least one midcoat in a non-stick coating system. The coating composition may be prepared and applied in the form of a liquid dispersion, and includes at least one fluoropolymer base component, such as polytetrafluoroethylene (PTFE) and, in particular, at least one high molecular weight PTFE (HPTFE). The coating composition additionally includes a blended fluoropolymer composition. The blended fluoropolymer composition is a blend of at least one low molecular weight PTFE (LPTFE) and at least one melt-processible fluoropolymer. After application directly to a substrate or over an underlying coating, the coating demonstrates improved abrasion and scratch resistance, as well as improved release characteristics, as compared to known coatings that include only HPTFE or HPTFE with a small amount of melt processible fluoropolymer.

8404309, Mar 26, 2013

Sep 25, 2009

12/567446

Leonard W. Harvey - Downingtown PA, US
Helen L. Brain - Merseyside, GB

Whitford Corporation - Elverson PA

B05D 3/02
C08L 27/18

4273722, 524520, 524544, 524546, 525199, 525200

Blended fluoropolymer compositions that may be applied as a coating to a flexible substrate. The compositions include at least one high molecular weight polytetrafluoroethylene (HPTFE), at least one a low molecular weight polytetrafluoroethylene (LPTFE) and at least one melt processible fluoropolymer (MPF). After being applied to the flexible substrate, optionally over a primer or basecoat and/or midcoat and then cured, the compositions form coatings that demonstrate improvement in one or more of abrasion resistance, release characteristics, translucency/transparency, and impermeability.

8586677, Nov 19, 2013

Apr 11, 2011

13/391353

Leonard W. Harvey - Downingtown PA, US
Helen L. Brain - Merseyside, GB
Susan J. Roberts-Bleming - Cheshire, GB
Lawrence D. Leech - West Chester PA, US
Thomas J. Bate - Glenview IL, US

Whitford Corporation - Elverson PA

C08L 27/12

525199, 525200

Blended fluoropolymer compositions that, in one exemplary application, may be applied as a coating to a substrate and, optionally, may be applied to a substrate that has been previously coated with a primer or basecoat and/or a midcoat. In one embodiment, the composition is a blend of at least one high molecular weight trace modified polytetrafluoroethyelene (TMHPTFE) and at least one melt-processible fluoropolymer (MPF). After being applied to the substrate, optionally over a primer or basecoat and/or midcoat, and then cured, the present compositions form coatings that demonstrate improved abrasion resistance and/or improved release characteristics and/or increased translucency/transparency and/or improved impermeability. The present compositions may also be used to produce films having a high degree of clarity and impermeability. The present compositions in powder form may be melt or paste extruded to form articles with improved impermeability.