US1956200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drill and clean out machine
Assignee: Individual
•
Filing: 1933-04-25
•
Granted: 1934-04-24
•
Expires: 1953-04-25
Abstract
No abstract record available.
Inventors
- 👤 Robert L Rector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:08
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/021
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) | 1937-04-23 | 1937-10-23 | 1938-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-23 | 1941-10-23 | 1942-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-23 | 1945-10-23 | 1946-04-24 | $7700.00 | Window Closed / Lapsed |