US2880754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air relay valve operable by both input and exhaust control means
Assignee: POWER BRAKE EQUIPMENT CO
•
Filing: 1955-12-19
•
Granted: 1959-04-07
•
Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Norman C Williams
- 👤 Rollin W Fishwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:18
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/14; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86919; Y10T137/87169; Y10T137/87233
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA527495A
Cited
US1747910A
Cited
US2171613A
Cited
US2657701A
Cited
US2656014A
Cited
US2682282A
Cited
US2812218A
Cited
US2772926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |