US5017318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a water filter
Assignee: Access Business Group International LLC
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Filing: 1989-02-17
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Granted: 1991-05-21
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Expires: 2009-02-17
Abstract
Abstract The specification discloses a double shell filter comprising an inner shell of bounded 80 to 400 U.S. mesh screen carbon particles and an outer shell of bonded 20 to 80 mesh screen carbon particles wherein the inner and outer particles are bonded internally to each other and the two shells are bonded together preferably by an ultra high molecular weight polymer binder having a melt index of less than about 1 gram per ten minutes as determined by ASTM D1238 at 190 degrees C. and 15 kilograms load.
Inventors
- 👤 Herbert J. VanderBilt
- 👤 Timothy D. Modert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:35
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2055; B01D39/2058; B01D39/2062; C; C02; C02F; C02F1/00; C02F1/001; C02F1/003; C02F1/28; C02F1/283; C02F1/288; B01D2239/00; B01D2239/06; B01D2239/065; B01D2239/0681; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1241; C02F2201/00; C02F2201/002; C02F2201/006; Y; Y10; Y10S; Y10S264/00; Y10S264/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A method of making a carbon particle filter comprising: providing a mold defining the exterior configuration of said filter; mixing the carbon particles with a binder and filling it into said mold, said binder comprising a low melt index polymeric material having a melt index of less than 1 gram per 10 minutes as determined by ASTM D 1238 at 190 degrees C. and 15 kilograms load, whereby said polymeric material will tackify at elevated temperatures without becoming sufficiently liquid to substantially wet the carbon particles in order that diminution of the effective carbon surface is eliminated; and subjecting said carbon particles and said binder to heat and pressure to cause said carbon particles to bind to each other whereby a carbon particle filter can be obtained.
Claim 2
Independent Claim
127 words
A method of making a carbon particle filter comprising: providing a mold defining the exterior configuration of said filter; mixing the carbon particles with a binder and filling it into said mold, said binder comprising a low melt index polymeric material having a melt index of less than 1 gram per 10 minutes as determined by ASTM D 1238 at 190 degrees C. and 15 kilograms load, whereby said polymeric material will tackify at elevated temperatures without becoming sufficiently liquid to substantially wet the carbon particles in order that diminution of the effective carbon surface is eliminated; and subjecting said carbon particles and said binder to heat and pressure to cause said carbon particles to bind to each other whereby a carbon particle filter can be obtained.
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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) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |