US Patent No: 5,882,519

Number of patents in Portfolio can not be more than 2000

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

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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, DE12056

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chou, Richard Tien-Hua Wilmington, DE 7 77
Ireland, Patrick Stephen Hockessin, DE 3 27
Lim, Hyun Sung Midlothian, VA 53 587
Molnar, Charles John Wilmington, DE 3 27
Shin, Hyunkook Wilmington, DE 54 606

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Minnesota Mining and Manufacturing Company (4)
4,215,682 Melt-blown fibrous electrets 311 1978
4,588,537 Method for manufacturing an electret filter medium 178 1984
5,411,576 Oily mist resistant electret filter media and method for filtering 125 1994
5,496,507 Method of charging electret filter media 175 1994
 
FIBERWEB HOLDINGS LIMITED (1)
5,620,785 Meltblown barrier webs and processes of making same 86 1995
 
JAPAN VILENE COMPANY, LTD. (1)
4,592,815 Method of manufacturing an electret filter 176 1985
 
JOHNSON & JOHNSON MEDICAL, INC. (1)
4,375,718 Method of making fibrous electrets 191 1981
 
KIMBERLY-CLARK WORLDWIDE, INC. (1)
5,534,335 Nonwoven fabric formed from alloy fibers 22 1994
 
MITSUI CHEMICALS, INC. (1)
4,626,263 High-performance electret and air filter 75 1985
 
TOYO BOSEKI KABUSHIKI KAISHA (1)
4,789,504 Electretized material for a dust filter 75 1986

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
3M INNOVATIVE PROPERTIES COMPANY (1)
6,805,048 Method of marking a substrate using an electret stencil 13 2002
 
OBERLIN FILTER COMPANY (1)
6,355,171 Filter sock for liquid filtration apparatus 4 1999