Richard E Gahan

US Patent:

6780226, Aug 24, 2004

Filed:

Apr 5, 1996

Appl. No.:

08/628327

Inventors:

Norman Lifshutz - Nashua NH
Richard E. Gahan - Wrentham MA
Graham C. Stevens - Quincy MA

Assignee:

Hollingsowrth Vose Company - East Walpole MA

International Classification:

B03C 3155

US Classification:

96 15, 55524, 55528, 55DIG 5, 55DIG 35, 55DIG 39, 95 59, 96 66, 96 69, 12820527, 12820529, 442 82, 442 92

Abstract:

An electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achieves acceptable alpha values for a range of filtration challenges without significant decay in alpha values over time. Preferred charge additives include fatty acid amides, oleophobic fluorochemical surfactants, and mixtures thereof.

US Patent:

6802315, Oct 12, 2004

Filed:

Mar 21, 2001

Appl. No.:

09/813548

Inventors:

Richard E. Gahan - Wrentham MA
Wai Ming Choi - West Newton MA

Assignee:

Hollingsorth Vose Company - East Walpole MA

International Classification:

A62B 2302

US Classification:

12820612, 12820117, 12820129, 12820527, 12820529, 12820611, 12820618, 12820619, 55524, 55528, 55DIG 39, 96 69

Abstract:

A vapor phase treated electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achieves acceptable alpha values for a range of filtration challenges without significant decay in alpha values over time. Preferred charge additives include fatty acid amides and mixtures thereof. Exemplary vapor phase deposition monomers include fluorinated monomers.

US Patent:

7883562, Feb 8, 2011

Filed:

Feb 27, 2008

Appl. No.:

12/038049

Inventors:

David Thomas Healey - Bellingham MA, US
Richard E. Gahan - Wrentham MA, US

Assignee:

Hollingsworth & Vose Company - East Walpole MA

International Classification:

B01D 46/00

US Classification:

55487, 55486, 55497, 55499, 55501, 55521

Abstract:

Various high performance, high efficiency filter media are provided that are cost effective and easy to manufacture. In particular, various filter media are provided having at least one layer with a waved configuration that results in an increased surface area, thereby enhancing various properties of the filter media. The filter media can be used to form a variety of filter elements for use in various applications.

US Patent:

8197569, Jun 12, 2012

Filed:

Dec 30, 2010

Appl. No.:

12/982103

Inventors:

David Thomas Healey - Bellingham MA, US
Richard E. Gahan - Wrentham MA, US

Assignee:

Hollingsworth & Vose Company - East Walpole MA

International Classification:

B01D 46/00

US Classification:

55487, 55486, 55497, 55499, 55501, 55521

Abstract:

Various high performance, high efficiency filter media are provided that are cost effective and easy to manufacture. In particular, various filter media are provided having at least one layer with a waved configuration that results in an increased surface area, thereby enhancing various properties of the filter media. The filter media can be used to form a variety of filter elements for use in various applications.

US Patent:

8202340, Jun 19, 2012

Filed:

Mar 6, 2009

Appl. No.:

12/399281

Inventors:

David T. Healey - Bellingham MA, US
Richard Gahan - Wrentham MA, US

Assignee:

Hollingsworth & Vose Company - East Walpole MA

International Classification:

B01D 46/00

US Classification:

55487, 55486, 55521

Abstract:

Various high performance, high efficiency filter media are provided that are cost effective and easy to manufacture. In particular, various filter media are provided having at least one layer with a waved configuration that results in an increased surface area, thereby enhancing various properties of the filter media. The filter media can be used to form a variety of filter elements for use in various applications.

US Patent:

8257459, Sep 4, 2012

Filed:

Jul 24, 2009

Appl. No.:

12/508770

Inventors:

David T. Healey - Bellingham MA, US
Richard Gahan - Wrentham MA, US

Assignee:

Hollingsworth & Vose Company - East Walpole MA

International Classification:

B01D 46/00
B01D 46/52

US Classification:

55486, 55487, 55521

Abstract:

Various high performance, high efficiency filter media are provided that are cost effective and easy to manufacture. In particular, various filter media are provided having at least one layer with a waved configuration that results in an increased surface area, thereby enhancing various properties of the filter media. The filter media can be used to form a variety of filter elements for use in various applications.

US Patent:

20050042454, Feb 24, 2005

Filed:

Aug 31, 2004

Appl. No.:

10/930066

Inventors:

Shawn Zhao - Westboro MA, US
Richard Gahan - Wrentham MA, US

Assignee:

Hollingsworth & Vose Company - East Walpole MA

International Classification:

B32B009/00
H01F001/00

US Classification:

428408000, 428332000, 429012000

Abstract:

Fuel cell gas diffusion layers are disclosed.

US Patent:

20070220852, Sep 27, 2007

Filed:

Mar 27, 2006

Appl. No.:

11/277575

Inventors:

Norman Lifshutz - Nashua NH, US
Douglas Klauber - Nashua NH, US
Richard Gahan - Wrentham MA, US

Assignee:

Hollingsworth and Vose Company - East Walpole MA

International Classification:

B01D 46/00

US Classification:

055486000

Abstract:

Various high performance, high efficiency, long service interval air filter media that are cost effective and easy to manufacture are provided. The filter media of the present invention can have at least two layers comprising blends of binder and non-binder fibers that are thermally bonded to one another and set to caliper in a high velocity forced draft oven. The layers can also be subsequently resin saturated, dried, and optionally cured. The resulting media can be characterized as having a gradient in properties such as fiber composition, fiber diameter, solidity, basis weight, and saturant content.