Patent US2022722A successfully refreshed from Google Patents.
US2022722A
Expired / Lapsed
US
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Train-line relief valve
Assignee: Consolidated Car Heating Co Inc
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Filing: 1931-04-03
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Granted: 1935-12-03
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Expires: 1951-04-03
Abstract
No abstract record available.
Inventors
- 👤 Louis C Hyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:07
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/02; F16T1/10
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) | 1938-12-02 | 1939-06-03 | 1939-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-02 | 1943-06-03 | 1943-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-02 | 1947-06-03 | 1947-12-03 | $7700.00 | Window Closed / Lapsed |