US4057509A
Expired / Lapsed
US
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Polygalactomannan allyl ether gels
Assignee: Stein Hall and Co Inc
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Filing: 1976-10-26
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Granted: 1977-11-08
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Expires: 1996-10-26
Abstract
Abstract This invention provides novel highly acidic gels of polygalactomannan allyl ether gum and sulfur dioxide. The gels exhibit dimensional stability, and are useful for oil well acidizing and borehole plugging, and for the preparation of explosive slurries.
Inventors
- 👤 John R. Costanza
- 👤 Ronald N. DeMartino
- 👤 Arthur M. Goldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:39
CPC Classifications
C; C10; C10L; C10L7/00; C10L7/02; B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0065; C08; C08K; C08K3/00; C08K3/30; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; C09K8/74; Y; Y10; Y10S; Y10S149/00; Y10S149/118; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
A gel composition consisting essentially of water, between about 0.05 and 2 weight percent sulfur dioxide, and between about 0.25 and 5 weight percent polygalactomannan allyl ether gum having a degree of substitution between about 0.01 and 3.0.
Claim 2
Dependent Claim
38 words
A gel composition consisting essentially of water, between about 0.05 and 2 weight percent sulfur dioxide, and between about 0.25 and 5 weight percent polygalactomannan allyl ether gum having a degree of substitution between about 0.01 and 3.0.
Claim 3
Dependent Claim
19 words
A gel composition in accordance with claim 1 wherein the polygalactomannan allyl ether gum is guar allyl ether gum.
Claim 4
Dependent Claim
20 words
A gel composition in accordance with claim 1 wherein the polygalactomannan allyl ether gum is locust bean allyl ether gum.
Claim 5
Dependent Claim
18 words
A gel composition in accordance with claim 1 wherein the pH of the composition is below about 3.
Claim 6
Dependent Claim
56 words
A process for preparing a gel of polygalactomannan allyl ether gum which comprises introducing sulfur dioxide into an aqueous solution of between about 0.25 and 5 weight percent polygalactomannan allyl ether gum having a degree of substitution between about 0.01 and 3.0 in sufficient quantity to increase the viscosity of the aqueous solution to gel formation.
Claim 7
Dependent Claim
56 words
A process for preparing a gel of polygalactomannan allyl ether gum which comprises introducing sulfur dioxide into an aqueous solution of between about 0.25 and 5 weight percent polygalactomannan allyl ether gum having a degree of substitution between about 0.01 and 3.0 in sufficient quantity to increase the viscosity of the aqueous solution to gel formation.
Claim 8
Dependent Claim
21 words
A process in accordance with claim 5 wherein the sulfur dioxide is introduced into the aqueous solution as a gaseous stream.
References Cited (Backward Citations)
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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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |