US2119829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and composition for preventing the loss of drilling fluid in well drilling operations
Assignee: Phillips Petroleum Co
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Filing: 1936-05-12
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Granted: 1938-06-07
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Expires: 1956-05-12
Abstract
No abstract record available.
Inventors
- 👤 Claude P Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:38
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035; E; E21; E21B; E21B21/00; E21B21/003; C09K2208/00; C09K2208/08
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) | 1941-06-06 | 1941-12-06 | 1942-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-06 | 1945-12-06 | 1946-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-06 | 1949-12-06 | 1950-06-07 | $7700.00 | Window Closed / Lapsed |