US2975964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary machine
Assignee: Westinghouse Air Brake Co
•
Filing: 1958-03-11
•
Granted: 1961-03-21
•
Expires: 1978-03-11
Abstract
No abstract record available.
Inventors
- 👤 Henry C Osterkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:57
CPC Classifications
F; F04; F04C; F04C29/00; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C29/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2593457A
Cited
US1573683A
Cited
US1677216A
Cited
US2246276A
Cited
US2330565A
Cited
US2335284A
Cited
US2368223A
Cited
US2377886A
Cited
US2377556A
Cited
GB567670A
Cited
US2400286A
Cited
US2588430A
Cited
US2641405A
Cited
US2762312A
Cited
US2710581A
Cited
US2720171A
Cited
US2820417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |