US1215071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloading-valve for compressors.
Assignee: Curtis & Co Manufacturing Co
•
Filing: 1916-01-29
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Granted: 1917-02-06
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Expires: 1936-01-29
Abstract
No abstract record available.
Inventors
- 👤 George F Steedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:55
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2617
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) | 1920-02-06 | 1920-08-07 | 1921-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-02-06 | 1924-08-07 | 1925-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-02-06 | 1928-08-07 | 1929-02-06 | $7700.00 | Window Closed / Lapsed |