US2074738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for compressors and the like
Assignee: Westinghouse Air Brake Co
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Filing: 1932-07-30
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Granted: 1937-03-23
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Expires: 1952-07-30
Abstract
No abstract record available.
Inventors
- 👤 Burton S Aikman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:32
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/02; F04B39/00; F04B39/02; F04B2201/00; F04B2201/12; F04B2201/124
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) | 1940-03-22 | 1940-09-21 | 1941-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-22 | 1944-09-21 | 1945-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-22 | 1948-09-21 | 1949-03-23 | $7700.00 | Window Closed / Lapsed |