Patent US1933589A successfully refreshed from Google Patents.
US1933589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling mechanism
Assignee: Sullivan Machinery Co
•
Filing: 1928-02-20
•
Granted: 1933-11-07
•
Expires: 1948-02-20
Abstract
No abstract record available.
Inventors
- 👤 Morris P Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:41
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/66; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6771; Y10T74/00; Y10T74/17; Y10T74/173
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1936-11-06 | 1937-05-08 | 1937-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-06 | 1941-05-08 | 1941-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-06 | 1945-05-08 | 1945-11-07 | $7700.00 | Window Closed / Lapsed |