Patent US3634237A successfully refreshed from Google Patents.
US3634237A
Expired / Lapsed
US
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Viscous fluid compositions
Assignee: Schlumberger Technology Corp
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Filing: 1966-12-15
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Granted: 1972-01-11
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Expires: 1986-12-15
Abstract
Abstract THIS INVENTION DISCLOSES THE USE OF INORGANIC ALKALI METAL AND ALKALINE EARTH METAL SALTS, AND ALTERNATIVELY, ACIDS, TO EFFECT HYDRATION AND SUBSEQUENT THICKENING OF AQUEOUS ALOHOLIC SOLUTIONS CONTAINING NATURAL GUMS TO PROVIDE, E.G., EISCOUS FRACTURING FLUIDS FOR USE IN A METHOD OF STIMULATIN PRODUCTION IN OIL AND GAS WELLS.
Inventors
- 👤 Paul L Crenshaw
- 👤 Floyd F Flippen
- 👤 James P Glasgow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:00
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; Y; Y10; Y10S; Y10S507/00; Y10S507/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |