Patent US3004549A successfully refreshed from Google Patents.
US3004549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined automatic and manual drain valve
Assignee: Westinghouse Air Brake Co
•
Filing: 1959-10-29
•
Granted: 1961-10-17
•
Expires: 1979-10-29
Abstract
No abstract record available.
Inventors
- 👤 Temple Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:42
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/12; F16T1/14; F04; F04B; F04B39/00; F04B39/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3102; Y10T137/3105
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1194346A
Cited
US2213488A
Cited
US2280615A
Cited
US2427755A
Cited
US2454621A
Cited
US2728564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |