US2982466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor unloading apparatus
Assignee: Westinghouse Air Brake Co
•
Filing: 1958-11-21
•
Granted: 1961-05-02
•
Expires: 1978-11-21
Abstract
No abstract record available.
Inventors
- 👤 Jerome R Pier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:03
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/08; F04B45/00; Y; Y10; Y10S; Y10S280/00; Y10S280/01; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2703
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US476756A
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US823315A
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US1881939A
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US2064750A
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US2094171A
Cited
US2650543A
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US2472802A
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US2540328A
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US2786424A
Cited
US2950684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |