Patent US4139000A successfully refreshed from Google Patents.
US3017351A
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US
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Shale hydration inhibitors for clear water drilling fluids
Assignee: Pan American Petroleum Corp
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Filing: 1958-11-06
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Granted: 1962-01-16
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Expires: 1978-11-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Platho P Scott
- 👤 Duane B Anderson
- 👤 Park Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:16
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A DRILLING FLUID COMPRISING WATER SUBSTANTIALLY FREE FO COLLIODALLY DISPERSED SOLIDS, CONTAINING IN EACH 42-GALLON BARREL OF WATER AT LEAST ABOUT 3 POUNDS OF A SALT SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE AMMONIUM AND POTASSIUM SALTS AND AT LEAST ABOUT 0.5 POUNDS OF A WATER-SOLUBLE FORM OF AN AMINE HAVING A HYDROCARBON RADICAL CONTAINING AT LEAST ABOUT 12 CARBON ATOMS.
Claim 2
Dependent Claim
61 words
A DRILLING FLUID COMPRISING WATER SUBSTANTIALLY FREE FO COLLIODALLY DISPERSED SOLIDS, CONTAINING IN EACH 42-GALLON BARREL OF WATER AT LEAST ABOUT 3 POUNDS OF A SALT SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE AMMONIUM AND POTASSIUM SALTS AND AT LEAST ABOUT 0.5 POUNDS OF A WATER-SOLUBLE FORM OF AN AMINE HAVING A HYDROCARBON RADICAL CONTAINING AT LEAST ABOUT 12 CARBON ATOMS.
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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) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |