US2637527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well drilling device
Assignee: Individual
•
Filing: 1950-08-21
•
Granted: 1953-05-05
•
Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph B Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/024; E21B4/00; E21B4/04; E21B4/18; E21B7/00; E21B7/04; E21B7/06; E21B7/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE317663C
Cited
US478791A
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US1315422A
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DE347356C
Cited
US840148A
Cited
US1411896A
Cited
GB126804A
Cited
US1868833A
Cited
US2192909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |