Meltblown ionomer microfibers and non-woven webs made therefrom for gas filters

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO

5882519

SERIAL NO

08900803

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Ethylene/carboxylic acid ionomers may be made, using a meltspun, and particularly meitblown process, into microfibers and thence to filter webs which are efficient gas filters for removing particles having a diameter of from 0.5 to 20 microns from a gas. The webs are effective without a deliberate specific post-charging operation during production. A deliberate post-charging operation can also be carried out to result in further efficiency.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
E. I. DU PONT DE NEMOURS AND COMPANYWILMINGTON, DE4833

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chou, Richard Tien-Hua Wilmington, DE 7 85
Ireland, Patrick Stephen Hockessin, DE 3 29
Lim, Hyun Sung Chesterfield, VA 41 956
Molnar, Charles John Wilmington, DE 3 29
Shin, Hyunkook Wilmington, DE 51 655

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Minnesota Mining and Manufacturing Company (3)
* 4588537 Method for manufacturing an electret filter medium 182 1984
* 5411576 Oily mist resistant electret filter media and method for filtering 129 1994
* 5496507 Method of charging electret filter media 192 1994
 
Toyo Boseki Kabushiki Kaisha (1)
* 4789504 Electretized material for a dust filter 76 1986
 
SURGIKOS, INC., (CHANGED TO) (1)
* 4375718 Method of making fibrous electrets 198 1981
 
FIBERWEB HOLDINGS LIMITED (1)
* 5620785 Meltblown barrier webs and processes of making same 104 1995
 
KIMBERLY-CLARK WORLDWIDE, INC. (1)
* 5534335 Nonwoven fabric formed from alloy fibers 22 1994
 
Japan Vilene Company, Ltd. (1)
* 4592815 Method of manufacturing an electret filter 182 1985
 
MITSUI CHEMICALS, INC. (1)
* 4626263 High-performance electret and air filter 76 1985
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
3M INNOVATIVE PROPERTIES COMPANY (5)
6805048 Method of marking a substrate using an electret stencil 13 2002
* 2004/0043,221 Method of adhering a film and articles therefrom 8 2002
* 2004/0092,191 Multiple component meltblown webs 2 2002
* 2004/0081,844 Method of making erasable articles and articles therefrom 13 2003
* 2005/0178,499 Methods for electrostatically adhering an article to a substrate 2 2005
 
Oberlin Filter Company (1)
6355171 Filter sock for liquid filtration apparatus 4 1999
 
GINER ELECTROCHEMICAL SYSTEMS, LLC (1)
* 2012/0111,198 Straight pore microfilter with efficient regeneration 0 2011
* Cited By Examiner