Patent US3820801A successfully refreshed from Google Patents.
Patent US3909421A successfully refreshed from Google Patents.
US3909421A
Expired / Lapsed
US
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Method of making high viscosity aqueous mediums
Assignee: Individual
•
Filing: 1973-08-20
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Granted: 1975-09-30
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Expires: 1993-08-20
Abstract
Abstract High viscosity aqueous mediums are produced by the simultaneous addition to an aqueous solution of a major effective amount of a particulate, high molecular weight, hydratable polymer, such as hydrolyzed polyacrylamide and a minor effective amount of a particulate inorganic compound, such as bentonite, to thereby form a complex between the polymer and the inorganic compound to give the final aqueous composition an increased viscosity. The polymer and inorganic compound are preferably added to the water by dispersing a physical admixture of the polymer and inorganic compound as discrete particles onto a moving plane of water to assure intimate contact of the polymer and compound as they contact the water.
Inventors
- 👤 Preston G Gaddis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:03
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20; C; C08; C08K; C08K3/00; C08K3/34; C08K3/346; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206; C09K8/22; C09K8/24; C09K8/58; C09K8/588; Y; Y10; Y10S; Y10S507/00; Y10S507/904; Y10S507/935
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
IN A METHOD OF INCREASING THE VISCOSITY OF AN AQUEOUS MEDIUM WHEREIN A PARTICULATE HYDRATABLE POLYMER HAVING A MOLECULAR WEIGHT IN EXCESS OF 10,000 IS TO BE ADMIXED WITH THE AQUEOUS MEDIUM TO INCREASE ITS VISCOSITY THE IMPROVEMENT WHICH COMPRISES: DISPENSING THE AQUEOUS MEDIUM TO FORM A SHEET OF THE MEDIUM, SIMULTANEOUSLY DISPENSING SAID POLYMER AND A MINOR VISCOSITY ENHANCING AMOUNT OF A DRY, PARTICULATE, INORGANNIC, HYDRATABLE CLAY ONTO SAID SHEET OF THE AQUEOUS MEDIUM SO THAT THE POLYMER AND CLAY PARTICLES ARE IN CLOSE PHYSICAL PROXIMATELY AND THEY FORM A THIN RELATIVELY WIDE CURTAINLIKE LAYER OF DISCRETE PARTICLES BEFORE CONTACT WITH THE AQUEOUS MEDIUM TO CAUSE INTIMATE ADMIXTURE OF THE POLYMER AND CLAY THE RATIO OF CLAY TO POLYMER BY WEIGHT BEING LESS THAN ABOUT 1 TO 1.
Claim 2
Dependent Claim
129 words
IN A METHOD OF INCREASING THE VISCOSITY OF AN AQUEOUS MEDIUM WHEREIN A PARTICULATE HYDRATABLE POLYMER HAVING A MOLECULAR WEIGHT IN EXCESS OF 10,000 IS TO BE ADMIXED WITH THE AQUEOUS MEDIUM TO INCREASE ITS VISCOSITY THE IMPROVEMENT WHICH COMPRISES: DISPENSING THE AQUEOUS MEDIUM TO FORM A SHEET OF THE MEDIUM, SIMULTANEOUSLY DISPENSING SAID POLYMER AND A MINOR VISCOSITY ENHANCING AMOUNT OF A DRY, PARTICULATE, INORGANNIC, HYDRATABLE CLAY ONTO SAID SHEET OF THE AQUEOUS MEDIUM SO THAT THE POLYMER AND CLAY PARTICLES ARE IN CLOSE PHYSICAL PROXIMATELY AND THEY FORM A THIN RELATIVELY WIDE CURTAINLIKE LAYER OF DISCRETE PARTICLES BEFORE CONTACT WITH THE AQUEOUS MEDIUM TO CAUSE INTIMATE ADMIXTURE OF THE POLYMER AND CLAY THE RATIO OF CLAY TO POLYMER BY WEIGHT BEING LESS THAN ABOUT 1 TO 1.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said polymer is a polyacrylamide.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein said polymer is a polysaccharide.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said polymer is a carboxymethyl cellulose.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein said polymer is a polyethylene oxide.
Claim 7
Dependent Claim
138 words
An improvement in the method of increasing the viscosity of water by the addition to the water of a dry, particulate, high molecular weight polymer having a molecular weight in excess of 10,000, which upon hydrolysis will have electrically charged sites thereon, the improvement which comprises: dispensing the aqueous medium to form a sheet of the medium; simultaneously dispensing onto said sheet said polymer and a dry, particulate, inorganic, hydratable clay having a net electrical charge which attracts it to the polymer and thereby increases the effective size of the polymer particles, the polymer and clay being dispensed as a thin, relatively wide curtain-like layer of discrete particles before contact with the aqueous medium to cause intimate admixture of the polymer and clay, the ratio of clay to polymer, by weight, being less than about 1 to 1.
Claim 8
Dependent Claim
138 words
An improvement in the method of increasing the viscosity of water by the addition to the water of a dry, particulate, high molecular weight polymer having a molecular weight in excess of 10,000, which upon hydrolysis will have electrically charged sites thereon, the improvement which comprises: dispensing the aqueous medium to form a sheet of the medium; simultaneously dispensing onto said sheet said polymer and a dry, particulate, inorganic, hydratable clay having a net electrical charge which attracts it to the polymer and thereby increases the effective size of the polymer particles, the polymer and clay being dispensed as a thin, relatively wide curtain-like layer of discrete particles before contact with the aqueous medium to cause intimate admixture of the polymer and clay, the ratio of clay to polymer, by weight, being less than about 1 to 1.
Claim 9
Dependent Claim
11 words
The method of claim 6 wherein said polymer is a polyacrylamide.
Claim 10
Dependent Claim
11 words
The method of claim 6 wherein said polymer is a polysaccharide.
Claim 11
Dependent Claim
12 words
The method of claim 6 wherein said polymer is a carboxymethyl cellulose.
Claim 12
Dependent Claim
12 words
The method of claim 6 wherein said polymer is a polyethylene oxide.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |