Patent US3397773A successfully refreshed from Google Patents.
US3223162A
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Polymerization method
Assignee: Sinclair Research Inc
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Filing: 1961-08-22
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Granted: 1965-12-14
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Expires: 1981-08-22
Abstract
No abstract record available.
Inventors
- 👤 Leonard L Burge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:42
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/5083; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
A METHOD FOR DECREASING THE PERMEABILITY OF A PERMEABLE AREA IN A WELL, THE STEPS COMPRISING INTRODUCING AN AQUEOUS SOLUTION CONTAINING A MIXTURE OF (A) ABOUT 1 TO 25 WEIGHT PERCENT OF A MONOMERICA ALKYLIDENE BISACRYLAMIDE OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |