US2227582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch particularly suitable for machine tool holders
Assignee: Individual
•
Filing: 1939-01-10
•
Granted: 1941-01-07
•
Expires: 1959-01-10
Abstract
No abstract record available.
Inventors
- 👤 Hillman William Charter
- 👤 Trumble John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/16; B23B39/20; B23B39/205; Y; Y10; Y10T; Y10T408/00; Y10T408/70; Y10T408/72; Y10T408/73
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) | 1944-01-07 | 1944-07-08 | 1945-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-07 | 1948-07-08 | 1949-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-07 | 1952-07-08 | 1953-01-07 | $7700.00 | Window Closed / Lapsed |