US1394192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of drilling wells
Assignee: Individual
•
Filing: 1919-11-22
•
Granted: 1921-10-18
•
Expires: 1939-11-22
Abstract
No abstract record available.
Inventors
- 👤 John A Fitzpatrick
- 👤 George A Fitzpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:35
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/04
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) | 1924-10-17 | 1925-04-18 | 1925-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-10-17 | 1929-04-18 | 1929-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-10-17 | 1933-04-18 | 1933-10-18 | $7700.00 | Window Closed / Lapsed |