US2961400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of swelling of silicates
Assignee: Dow Chemical Co
•
Filing: 1958-04-07
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Granted: 1960-11-22
•
Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 Park Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/588; C09K8/60; C09K8/62; Y; Y10; Y10S; Y10S507/00; Y10S507/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE PROCESS OF TREATING EARTH STRATA CONTAINING ARGILLACEOUS MATERIAL WHICH CONSISTS ESENTIALLY OF INJECTING INTO SAID STRATE THROUGH A WELL THEREIN AN AQUEOUS TREATING LIQUID HAVING A PH BETWEEN 5.5 AND 11.0 AND CONTAINING BETWEEN 0.005 AND 0.1 GRAM OF A WATERSOLUBLE CELLULOSE DERIVATIVE PER 100 MILLIMETERS OF THE TREATING LIQUIDS.
Claim 2
Dependent Claim
51 words
THE PROCESS OF TREATING EARTH STRATA CONTAINING ARGILLACEOUS MATERIAL WHICH CONSISTS ESENTIALLY OF INJECTING INTO SAID STRATE THROUGH A WELL THEREIN AN AQUEOUS TREATING LIQUID HAVING A PH BETWEEN 5.5 AND 11.0 AND CONTAINING BETWEEN 0.005 AND 0.1 GRAM OF A WATERSOLUBLE CELLULOSE DERIVATIVE PER 100 MILLIMETERS OF THE TREATING LIQUIDS.
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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |