US2949894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydro-pneumatic hoist control apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1957-03-19
•
Granted: 1960-08-23
•
Expires: 1977-03-19
Abstract
No abstract record available.
Inventors
- 👤 Ellis E Hewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/04; F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B2211/00; F15B2211/20; F15B2211/21; F15B2211/216; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30525; F15B2211/31; F15B2211/3105; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/40; F15B2211/405; F15B2211/40507; F15B2211/46; F15B2211/50; F15B2211/505; F15B2211/50554; F15B2211/515; F15B2211/5151; F15B2211/70; F15B2211/75; F15B2211/80; F15B2211/86; F15B2211/8606; F15B2211/885; F15B2211/8855
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |