US2561075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well drilling
Assignee: Individual
•
Filing: 1949-09-17
•
Granted: 1951-07-17
•
Expires: 1969-09-17
Abstract
No abstract record available.
Inventors
- 👤 Carroll V Sidwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:58
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US443069A
Cited
US1807082A
Cited
US2003701A
Cited
US2265773A
Cited
US2214366A
Cited
US2283564A
Cited
US2337295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |