US2110691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor valve
Assignee: Westinghouse Air Brake Co
•
Filing: 1936-03-21
•
Granted: 1938-03-08
•
Expires: 1956-03-21
Abstract
No abstract record available.
Inventors
- 👤 Burton S Aikman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:14
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1013; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-03-07 | 1941-09-06 | 1942-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-07 | 1945-09-06 | 1946-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-07 | 1949-09-06 | 1950-03-08 | $7700.00 | Window Closed / Lapsed |