US2219269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum power clutch
Assignee: Individual
•
Filing: 1931-01-17
•
Granted: 1940-10-22
•
Expires: 1951-01-17
Abstract
No abstract record available.
Inventors
- 👤 Mccollum James Harry Keighley
- 👤 Mccollum Henry John De Neville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:47
CPC Classifications
F; F16; F16D; F16D48/00; F16D48/06; B; B60; B60W; B60W10/00; B60W10/02; B60W10/04; F16D48/02; F16D2048/0212; F16D2048/0221; F16D2048/0224; F16D2500/00; F16D2500/10; F16D2500/102; F16D2500/1028
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) | 1943-10-22 | 1944-04-22 | 1944-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-22 | 1948-04-22 | 1948-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-22 | 1952-04-22 | 1952-10-22 | $7700.00 | Window Closed / Lapsed |