Patent US2519145A successfully refreshed from Google Patents.
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US4604205A
Expired / Lapsed
US
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Water removing filter media
Assignee: Central Illinois Manufacturing Co
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Filing: 1984-11-13
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Granted: 1986-08-05
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Expires: 2004-11-13
Abstract
Abstract A filter media for use in a filter employed to separate water and particulate material from a liquid to be purified, such as a hydrocarbon fuel. The filter media includes a porous material such as glass fiber having a density sufficient to provide the desired mechanical filtration and which carries a water insoluble, water-absorbing material as, for example, a starch-polyacrylonitrile graft copolymer. Also disclosed is a filter employing the media and a method of making the media.
Inventors
- 👤 William R. Ayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:24
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/06; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/04; B01D17/045; B01D17/08; B01D17/10; B01D39/00; B01D39/14; Y; Y10; Y10S; Y10S210/00; Y10S210/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A water absorbing, mechanical filter comprising: a filter housing; an inlet port in said housing; an outlet port in said housing; said housing further including means defining a liquid flowpath from said inlet port to said outlet port; a body of fibrous material within said housing and extending across said flowpath; and a quantity of starch-polyacrylonitrile graft copolymer dispersed throughout and fixed to said body, the distribution of the graft copolymer within said body being greater nearer said outlet port than said inlet port.
Claim 2
Dependent Claim
84 words
A water absorbing, mechanical filter comprising: a filter housing; an inlet port in said housing; an outlet port in said housing; said housing further including means defining a liquid flowpath from said inlet port to said outlet port; a body of fibrous material within said housing and extending across said flowpath; and a quantity of starch-polyacrylonitrile graft copolymer dispersed throughout and fixed to said body, the distribution of the graft copolymer within said body being greater nearer said outlet port than said inlet port.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |