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

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

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.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
E. I. DU PONT DE NEMOURS AND COMPANYWILMINGTON, DE4566

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chou, Richard Tien-Hua Wilmington, DE 7 86
Ireland, Patrick Stephen Hockessin, DE 3 29
Lim, Hyun Sung Chesterfield, VA 41 1082
Molnar, Charles John Wilmington, DE 3 29
Shin, Hyunkook Wilmington, DE 51 667

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Minnesota Mining and Manufacturing Company (3)
* 4588537 Method for manufacturing an electret filter medium 186 1984
* 5411576 Oily mist resistant electret filter media and method for filtering 131 1994
* 5496507 Method of charging electret filter media 203 1994
 
TOYOBO CO., LTD. (1)
* 4789504 Electretized material for a dust filter 80 1986
 
SURGIKOS, INC., (1)
* 4375718 Method of making fibrous electrets 201 1981
 
FIBERWEB HOLDINGS LIMITED (1)
* 5620785 Meltblown barrier webs and processes of making same 110 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 186 1985
 
MITSUI CHEMICALS, INC. (1)
* 4626263 High-performance electret and air filter 76 1985
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
3M INNOVATIVE PROPERTIES COMPANY (6)
6805048 Method of marking a substrate using an electret stencil 13 2002
* 2004/0202,820 Perforated electret articles and method of making the same 3 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, L.L.C. (1)
* 2012/0111,198 Straight pore microfilter with efficient regeneration 0 2011
* Cited By Examiner