US4859386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a water filter
Assignee: Access Business Group International LLC
•
Filing: 1988-02-01
•
Granted: 1989-08-22
•
Expires: 2008-02-01
Abstract
Abstract A double shell filter including 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
2026-10-28 20:33
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; B01D2239/08; B01D2239/086; B01D2239/10; B01D2239/12; B01D2239/1241; B01D2239/125; C02F2201/00; C02F2201/002; C02F2201/006; Y; Y10; Y10S; Y10S264/00; Y10S264/48
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
221 words
A method of making a composite charcoal filter having inner and outer shells of two different types of charcoal particles comprising: providing a mold defining the exterior configuration of said composite filter; placing a separator in said composite mold at the desired juncture between said inner and outer shells; mixing said inner shell carbon material with a binder and filling it into said mold to the inside of said separator; mixing said outer shell carbon material with said binder and filling it into the space to the outside of said separator, said binder comprising a low melt index polymeric material having a sufficiently low melt index that it will tackify at elevated temperatures without becoming sufficiently liquid to substantially wet the carbon particles in order that diminution of the effective caron surface is minimized; and removing said separator and subjecting said two different carbon materials and their binders to heat and pressure to cause said carbon particles to bind to each other and to cause said inner shell of carbon material to bond to said outer shell of carbon material whereby an integral composite filter can be obtained, wherein said heat and pressure are applied such that said binder does not become sufficiently liquid to substantially wet the carbon particles in order that diminution of the effective carbon surface is minimized.
Claim 2
Independent Claim
221 words
A method of making a composite charcoal filter having inner and outer shells of two different types of charcoal particles comprising: providing a mold defining the exterior configuration of said composite filter; placing a separator in said composite mold at the desired juncture between said inner and outer shells; mixing said inner shell carbon material with a binder and filling it into said mold to the inside of said separator; mixing said outer shell carbon material with said binder and filling it into the space to the outside of said separator, said binder comprising a low melt index polymeric material having a sufficiently low melt index that it will tackify at elevated temperatures without becoming sufficiently liquid to substantially wet the carbon particles in order that diminution of the effective caron surface is minimized; and removing said separator and subjecting said two different carbon materials and their binders to heat and pressure to cause said carbon particles to bind to each other and to cause said inner shell of carbon material to bond to said outer shell of carbon material whereby an integral composite filter can be obtained, wherein said heat and pressure are applied such that said binder does not become sufficiently liquid to substantially wet the carbon particles in order that diminution of the effective carbon surface is minimized.
Claim 3
Dependent Claim
34 words
The method of claim 1 in which said binder has a melt index of less than 1 gram per ten minutes as determined by ASTM D 1238 at 190 degrees C. and 15 kilograms.
Claim 4
Dependent Claim
18 words
The method of claim 2 in which said melt index is less than 0.5 grams per ten minutes.
Claim 5
Dependent Claim
18 words
The method of claim 3 in which said melt index is less than 0.1 gram per ten minutes.
Claim 6
Dependent Claim
29 words
The method of claim 4 in which said polymeric binder comprises an ultra high molecular weight polymer having a molecular weight of from about 4 to about 6 million.
Claim 7
Dependent Claim
11 words
The method of claim 5 in which said binder comprises polyethylene.
Claim 8
Dependent Claim
29 words
The method of claim 2 in which said polymeric binder comprises an ultra high molecular weight polymer having a molecular weight of from about 4 to about 6 million.
Claim 9
Dependent Claim
11 words
The method of claim 7 in which said binder comprises polyethylene.
Claim 10
Dependent Claim
29 words
The method of claim 1 in which said polymeric binder comprises an ultra high molecular weight polymer having a molecular weight of from about 4 to about 6 million.
Claim 11
Dependent Claim
11 words
The method of claim 9 in which said binder comprises polyethylene.
Claim 12
Dependent Claim
42 words
The method of claim 1 in which said carbon particles are subjected to heat at a temperature of from about 175 degrees C. to about 205 degrees C. and a pressure of from about 30 to about 120 pounds per square inch.
Claim 13
Dependent Claim
40 words
The method of claim 1 in which said inner carbon material comprises from about 80 to about 400 U.S. mesh screen carbon particles and said outer carbon material comprises from about 20 to about 80 U.S. mesh screen carbon particles.
Claim 14
Dependent Claim
39 words
The method of claim 11 in which said binder is a low melt index polymeric material having a sufficiently low melt index that it will tackify at elevated temperatures without becoming sufficiently liquid to substantially wet the carbon particles.
Claim 15
Dependent Claim
34 words
The method of claim 13 in which said binder has a melt index of less than 1 gram per ten minutes as determined by ASTM D 1238 at 190 degrees C. and 15 kilograms.
Claim 16
Dependent Claim
18 words
The method of claim 14 in which said melt index is less than 0.5 grams per ten minutes.
Claim 17
Dependent Claim
18 words
The method of claim 15 in which said melt index is less than 0.1 gram per ten minutes.
Claim 18
Dependent Claim
11 words
The method of claim 16 in which said binder comprises polyethylene.
Claim 19
Dependent Claim
29 words
The method of claim 5 in which said polymeric binder comprises an ultra high molecular weight polymer having a molecular weight of from about 4 to about 6 million.
Claim 20
Dependent Claim
11 words
The method of claim 18 in which said binder comprises polyethylene.
Claim 21
Dependent Claim
29 words
The method of claim 16 in which said polymeric binder comprises an ultra high molecular weight polymer having a molecular weight of from about 4 to about 6 million
Claim 22
Dependent Claim
11 words
The method of claim 20 in which said binder comprises polyethylene.
Claim 23
Independent Claim
268 words
A method of making a composite charcoal filter having inner and outer shells of two different types of charcoal particles comprising: providing a mold defining the exterior configuration of said composite filter; placing a separator in said composite mold at the desired juncture between said inner and outer shells; mixing said inner shell carbon material with a binder and filling it into said mold to the inside of said separator; mixing said outer shell carbon material with said binder and filling it into the space to the outside of said separator, wherein said inner carbon material comprises from about 80 to about 400 U.S. mesh screen carbon particles and said outer carbon material comprises from about 20 to about 80 U.S. mesh screen carbon particles; and removing said separator and subjecting said two different carbon materials and their binders to heat and pressure to cause said carbon particles to bind to each other and to cause said inner shell of carbon material to bond to said outer shell of carbon material whereby an integral composite filter can be obtained, wherein said binder comprises an ultra high molecular weight polymer having a molecular weight of from about 4 to about 6 million, wherein said binder comprises polyethylene; and said carbon particles used to make said inner shell are finer than those used to make said outer shell and in which said pressure is exerted on said carbon materials and their binders by means of a piston having a diameter approximately equal to the diameter of said inner shell of carbon material, whereby pressure in concentrsated on said inner shell.
Claim 24
Independent Claim
268 words
A method of making a composite charcoal filter having inner and outer shells of two different types of charcoal particles comprising: providing a mold defining the exterior configuration of said composite filter; placing a separator in said composite mold at the desired juncture between said inner and outer shells; mixing said inner shell carbon material with a binder and filling it into said mold to the inside of said separator; mixing said outer shell carbon material with said binder and filling it into the space to the outside of said separator, wherein said inner carbon material comprises from about 80 to about 400 U.S. mesh screen carbon particles and said outer carbon material comprises from about 20 to about 80 U.S. mesh screen carbon particles; and removing said separator and subjecting said two different carbon materials and their binders to heat and pressure to cause said carbon particles to bind to each other and to cause said inner shell of carbon material to bond to said outer shell of carbon material whereby an integral composite filter can be obtained, wherein said binder comprises an ultra high molecular weight polymer having a molecular weight of from about 4 to about 6 million, wherein said binder comprises polyethylene; and said carbon particles used to make said inner shell are finer than those used to make said outer shell and in which said pressure is exerted on said carbon materials and their binders by means of a piston having a diameter approximately equal to the diameter of said inner shell of carbon material, whereby pressure in concentrsated on said inner shell.
Claim 25
Independent Claim
239 words
A method of making a composite charcoal filter having inner and outer shells of two different types of charcoal particles comprising: providing a mold defining the exterior configuration of said composite filter; placing a separator in said composite mold at the desired juncture between said inner and outer shells; mixing said inner shell carbon material with a binder and filling it into said mold to the inside of said separator; mixing said outer shell carbon material with said binder and filling it into the space to the outside of said separator, said binder comprising a low melt index polymeric material having a sufficiently low melt index that it will tackify at elevated temperatures without becoming sufficiently liquid to substantially wet the carbon particles; and removing said separator and subjecting said two different carbon materials and their binders to heat and pressure to cause said carbon particles to bind to each other and to cause said inner shell of carbon material to bond to said outer shell of carbon material whereby an integral composite filter can be obtained, wherein said carbon particles used to make said inner shell are finer than those used to make said outer shell and in which said pressure is exerted on said carbon materials and their binders by means of a piston having a diameter approximately equal to the diameter of said inner shell of carbon material, whereby pressure is concentrated on said inner shell.
Claim 26
Independent Claim
239 words
A method of making a composite charcoal filter having inner and outer shells of two different types of charcoal particles comprising: providing a mold defining the exterior configuration of said composite filter; placing a separator in said composite mold at the desired juncture between said inner and outer shells; mixing said inner shell carbon material with a binder and filling it into said mold to the inside of said separator; mixing said outer shell carbon material with said binder and filling it into the space to the outside of said separator, said binder comprising a low melt index polymeric material having a sufficiently low melt index that it will tackify at elevated temperatures without becoming sufficiently liquid to substantially wet the carbon particles; and removing said separator and subjecting said two different carbon materials and their binders to heat and pressure to cause said carbon particles to bind to each other and to cause said inner shell of carbon material to bond to said outer shell of carbon material whereby an integral composite filter can be obtained, wherein said carbon particles used to make said inner shell are finer than those used to make said outer shell and in which said pressure is exerted on said carbon materials and their binders by means of a piston having a diameter approximately equal to the diameter of said inner shell of carbon material, whereby pressure is concentrated on said inner shell.
Claim 27
Dependent Claim
34 words
The method of claim 23, in which said binder has a melt index of less than 1 gram per ten minutes as determined by ASTM D 1238 at 190 degrees C. and 15 kilograms.
Claim 28
Dependent Claim
39 words
The method of claim 22 in which said binder is a low melt index polymeric material having a sufficiently low melt index that it will tackify at elevated temperatures without becoming sufficiently liquid to substantially wet the carbon particles.
Claim 29
Dependent Claim
34 words
The method of claim 25 in which said binder has a melt index of less than 1 gram per ten minutes as determined by ASTM D 1238 at 190 degrees C. and 15 kilograms.
Claim 30
Dependent Claim
18 words
The method of claim 26 in which said melt index is less than 0.5 grams per ten minutes
Claim 31
Dependent Claim
18 words
The method of claim 27 in which said melt index is less than 0.1 gram per ten minutes.
Claim 32
Dependent Claim
29 words
The method of claim 23 in which said polymeric binder comprises an ultra high molecular weight polymer having a molecular weight of from about 4 to about 6 million.
Claim 33
Dependent Claim
11 words
The method of claim 23 in which said binder comprises polyethylene.
Claim 34
Dependent Claim
42 words
The method of claim 22 in which said carbon particles are subjected to heat at a temperature of from about 175 degrees C. to about 205 degrees C. and a pressure of from about 30 to about 120 pounds per square inch.
Claim 35
Dependent Claim
45 words
The method of claim 23 in which said carbon particles are subjected to heat at a temperature of from about 175 degrees C. to about 205 to about 205 degrees C. and a pressure of from about 30 to about 120 pounds per square inch.
References Cited (Backward Citations)
US3250397A
Cited
US3263812A
Cited
US3414642A
Cited
US3538020A
Cited
US3450632A
Cited
US3474600A
Cited
US3439809A
Cited
US3556304A
Cited
US3520417A
Cited
US4000236A
Cited
US3595399A
Cited
US3950251A
Cited
US4608213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |