US2663545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for well drilling and testing
Assignee: Individual
•
Filing: 1952-02-16
•
Granted: 1953-12-22
•
Expires: 1972-02-16
Abstract
No abstract record available.
Inventors
- 👤 Donovan B Grable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:07
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US385600A
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US597316A
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US682939A
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US1547240A
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US1602864A
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US2164195A
Cited
US2210815A
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US2231282A
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US2567451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |