US1952767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum power clutch mechanism
Assignee: Individual
•
Filing: 1931-02-17
•
Granted: 1934-03-27
•
Expires: 1951-02-17
Abstract
No abstract record available.
Inventors
- 👤 Mccollum Henry John De Neville
- 👤 Mccollum James Harry Keighley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:08
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W30/18009; B60W30/18072; B60W10/00; B60W10/02; B60W2510/00; B60W2510/06; B60W2510/0604; B60W2710/00; B60W2710/02; B60W2710/021; B60W2710/023
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) | 1937-03-26 | 1937-09-25 | 1938-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-03-26 | 1941-09-25 | 1942-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-03-26 | 1945-09-25 | 1946-03-27 | $7700.00 | Window Closed / Lapsed |