US2230046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill steel retainer
Assignee: Sullivan Machinery Co
•
Filing: 1938-06-24
•
Granted: 1941-01-28
•
Expires: 1958-06-24
Abstract
No abstract record available.
Inventors
- 👤 John C Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:18
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/08; B25D17/082; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17051; Y10T403/00; Y10T403/59; Y10T403/60; Y10T403/608
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) | 1944-01-28 | 1944-07-29 | 1945-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-28 | 1948-07-29 | 1949-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-28 | 1952-07-29 | 1953-01-28 | $7700.00 | Window Closed / Lapsed |