Patent US2011448A successfully refreshed from Google Patents.
US2011448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of well construction
Assignee: Individual
•
Filing: 1934-06-04
•
Granted: 1935-08-13
•
Expires: 1954-06-04
Abstract
No abstract record available.
Inventors
- 👤 Kelly William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:06
CPC Classifications
E; E03; E03B; E03B3/00; E03B3/06; E03B3/08; E03B3/12; Y; Y02; Y02A; Y02A20/00
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) | 1938-08-12 | 1939-02-11 | 1939-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-08-12 | 1943-02-11 | 1943-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-08-12 | 1947-02-11 | 1947-08-13 | $7700.00 | Window Closed / Lapsed |