US2821140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Vickers Inc
•
Filing: 1954-01-28
•
Granted: 1958-01-28
•
Expires: 1974-01-28
Abstract
No abstract record available.
Inventors
- 👤 Raymond B Pettibone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:04
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/06; F04C15/062; F15; F15B; F15B21/00; F15B21/008; F15B21/04; F15B21/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2251664A
Cited
GB559108A
Cited
US2325931A
Cited
US2363528A
Cited
US2385513A
Cited
US2683418A
Cited
US2642148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |