Patent US2727002A successfully refreshed from Google Patents.
US2727002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-foaming drilling fluid
Assignee: Sunoco Inc
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Filing: 1952-12-31
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Granted: 1955-12-13
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Expires: 1972-12-31
Abstract
No abstract record available.
Inventors
- 👤 David A Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:05
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26; C09K8/28; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A DRILLING FLUID COMPRISING SALT WATER CONTAINING AT LEAST 150,000 P. P. M. OF SALT AND HAVING DISPERSED THEREIN A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COLLOIDAL CLAY AND OIL, AND A MINOR AMOUNT OF TURKEY-RED OIL SUFFICIENT TO INHIBIT FOAMING.
Claim 2
Dependent Claim
42 words
A DRILLING FLUID COMPRISING SALT WATER CONTAINING AT LEAST 150,000 P. P. M. OF SALT AND HAVING DISPERSED THEREIN A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COLLOIDAL CLAY AND OIL, AND A MINOR AMOUNT OF TURKEY-RED OIL SUFFICIENT TO INHIBIT FOAMING.
References Cited (Backward Citations)
US1964641A
Cited
US2135745A
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US2209591A
Cited
US2169369A
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US2355255A
Cited
US2622070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |