Patent US3430088A successfully refreshed from Google Patents.
US2342588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing the loss of drilling fluid during the drilling of wells
Assignee: Individual
•
Filing: 1940-05-08
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Granted: 1944-02-22
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Expires: 1960-05-08
Abstract
No abstract record available.
Inventors
- 👤 Angus Katharine Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003; Y; Y10; Y10S; Y10S47/00; Y10S47/10
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) | 1947-02-21 | 1947-08-23 | 1948-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-02-21 | 1951-08-23 | 1952-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-02-21 | 1955-08-23 | 1956-02-22 | $7700.00 | Window Closed / Lapsed |