US1861099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple drilling mechanism
Assignee: Individual
•
Filing: 1930-01-25
•
Granted: 1932-05-31
•
Expires: 1950-01-25
Abstract
No abstract record available.
Inventors
- 👤 Wallace W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:48
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/16; B23B39/161; B23B39/165; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17666; Y10T279/17692; Y10T279/17743; Y10T279/17752; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6757; Y10T408/73; Y10T83/00; Y10T83/525; Y10T83/541; Y10T83/869; Y10T83/8759
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) | 1935-05-31 | 1935-11-30 | 1936-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-31 | 1939-11-30 | 1940-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-31 | 1943-11-30 | 1944-05-31 | $7700.00 | Window Closed / Lapsed |