Patent US4157322A successfully refreshed from Google Patents.
US4157322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water diverting gel compositions
Assignee: Monsanto Co
•
Filing: 1978-01-19
•
Granted: 1979-06-05
•
Expires: 1998-01-19
Abstract
Abstract This invention relates to the recovery of oil from underground deposits. The invention relates to novel gel compositions consisting of water, a polysaccharide polymer, an acid generating salt and a melamine resin. The invention also relates to the method of utilizing said composition to recovery underground oil.
Inventors
- 👤 George T. Colegrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:35
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/887; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/512; C09K8/90; C09K8/905
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
78 words
A composition of matter comprising water, 0.5 to 1.5% of a cross linkable polymer which is selected from the group consisting of cellulose, carboxymethyl cellulose, methyl cellulose, methyl hydroxy propyl cellulose, hydroxy ethyl cellulose, xanthan gums, guar gums, locust bean gums, gum tragacanths or alginates; 0.1-0.5% of an acid generating salt which is selected from the group consisting of ammonium chloride, ammonium sulfate, ammonium nitrate, or ammonium phosphate monobasic; and 0.5-1.25% of a partially methylated melamine formaldehyde resin.
Claim 2
Dependent Claim
78 words
A composition of matter comprising water, 0.5 to 1.5% of a cross linkable polymer which is selected from the group consisting of cellulose, carboxymethyl cellulose, methyl cellulose, methyl hydroxy propyl cellulose, hydroxy ethyl cellulose, xanthan gums, guar gums, locust bean gums, gum tragacanths or alginates; 0.1-0.5% of an acid generating salt which is selected from the group consisting of ammonium chloride, ammonium sulfate, ammonium nitrate, or ammonium phosphate monobasic; and 0.5-1.25% of a partially methylated melamine formaldehyde resin.
Claim 3
Dependent Claim
12 words
The composition of claim 1 in which 0.2-0.3% formaldehyde is optionally present.
References Cited (Backward Citations)
US3615794A
Cited
US3740360A
Cited
US3943078A
Cited
US3727412A
Cited
US3878141A
Cited
US3832229A
Cited
US3887506A
Cited
US3971440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |