Family

Loading Family data...

• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address	Total Patents
HOLLINGSWORTH & VOSE COMPANY	EAST WALPOLE, MA	64

International Classification(s)

• B03C:MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATE....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Gahan, Richard E	Wrentham, MA	9	118
Lifshutz, Norman	Nashua, NH	7	84
Stevens, Graham C	Quincy, MA	2	57

Cited Art Landscape

Patent Info	(Count)	# Cites	Year
Other [Check patent profile for assignment information] (1)
5,099,026 Fluorochemical oxazolidinones		79	1991
MINNESOTA MINING AND MANUFACTURING COMPANY (5)
* 4,874,399 Electret filter made of fibers containing polypropylene and poly(4-methyl-1-pentene)		122	1988
5,025,052 Fluorochemical oxazolidinones		151	1990
5,411,576 Oily mist resistant electret filter media and method for filtering		129	1994
* 5,417,678 Low profile ostomy filter		16	1994
* 5,472,481 Oily mist resistant electret filter media		119	1995
INVISTA NORTH AMERICA S.A.R.L. (1)
* 5,558,809 Polymer electrets with improved charge stability		37	1995
Toyo Boseki Kabushiki Kaisha (1)
4,789,504 Electretized material for a dust filter		76	1986
Her Majesty the Queen in right of Canada as represented by the Minister of National Defence of Canadian Government (1)
* 5,038,775 Plastic scrim		38	1988
TORAY INDUSTRIES, INC. (1)
* 5,057,710 Electret materials and the method for preparing the electret materials		97	1990
PALL CORPORATION (1)
* 4,508,775 Gas permeable composite structures		22	1983
HOLLINGSWORTH & VOSE COMPANY (1)
* 5,645,627 Charge stabilized electret filter media		51	1995
W. L. GORE & ASSOCIATES, INC. (1)
* 5,242,747 Gas permeable materials		10	1992
GORE HOLDINGS, INC. (1)
* 5,342,434 Gas permeable coated porous membranes		33	1993
W. L. Gore & Associates (UK) Ltd. (1)
* 5,496,396 Gas filter		11	1994
MITSUI CHEMICALS, INC. (3)
4,626,263 High-performance electret and air filter		76	1985
5,256,176 Film electret and an electret filter		42	1991
* 5,304,227 Electret filters		23	1993

* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info	(Count)	# Cites	Year
Other [Check patent profile for assignment information] (1)
* 2003/0213,218 Filtering material and device and method of its manufacture		6	2003
DELSTAR ELECTROSTATIC, INC. (1)
9,074,301 Filtration materials using fiber blends that contain strategically shaped fibers and/or charge control agents		0	2011
3M INNOVATIVE PROPERTIES COMPANY (2)
* 7,390,351 Electrets and compounds useful in electrets		6	2006
* 2007/0180,997 ELECTRETS AND COMPOUNDS USEFUL IN ELECTRETS		10	2006
HOLLINGSWORTH & VOSE COMPANY (5)
* 8,202,340 Waved filter media and elements		5	2009
8,257,459 Waved filter media and elements		3	2009
* 2010/0107,881 WAVED FILTER MEDIA AND ELEMENTS		10	2009
8,197,569 Waved filter media and elements		5	2010
8,882,875 Waved filter media and elements		0	2012

* Cited By Examiner

Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

---

Full Text

US Patent No: 6,780,226

Charge stabilized electret filter media

---

 

Legal Events