Patent US2548072A successfully refreshed from Google Patents.
US2548072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic governor responsive to rate of change of speed
Assignee: Westinghouse Electric Corp
•
Filing: 1949-10-20
•
Granted: 1951-04-10
•
Expires: 1969-10-20
Abstract
No abstract record available.
Inventors
- 👤 Anthony F Schwendner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:16
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/20; F01D17/22; F01D17/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2258136A
Cited
US2247434A
Cited
US2256963A
Cited
US2261462A
Cited
US2294975A
Cited
US2438662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |