Patent US2818813A successfully refreshed from Google Patents.
US2818813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Vickers Inc
•
Filing: 1954-09-09
•
Granted: 1958-01-07
•
Expires: 1974-09-09
Abstract
No abstract record available.
Inventors
- 👤 Raymond B Pettibone
- 👤 Russell H Hallman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:20
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; B; B60; B60K; B60K17/00; B60K17/04; B60K17/10; F15; F15B; F15B15/00; F15B15/18; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F04C2/00; F04C2/30; F04C2/34; F04C2/344
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2544987A
Cited
US2544990A
Cited
US2649737A
Cited
US2642802A
Cited
US2544988A
Cited
US2677330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |