Patent US1220729A successfully refreshed from Google Patents.
US1220729A
Expired / Lapsed
US
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Throttle-valve.
Assignee: CHAMBERS VALVE Co
•
Filing: 1916-05-19
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Granted: 1917-03-27
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Expires: 1936-05-19
Abstract
No abstract record available.
Inventors
- 👤 Frank H Clark
- 👤 Joseph M Coffey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:26
CPC Classifications
F; F01; F01B; F01B25/00; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6855; Y10T137/6858; Y10T137/6862; Y10T137/8593; Y10T137/86928; Y10T137/86936; Y10T137/86944; Y10T137/86952; Y10T137/86976; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/2063
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) | 1920-03-26 | 1920-09-25 | 1921-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-03-26 | 1924-09-25 | 1925-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-03-26 | 1928-09-25 | 1929-03-27 | $7700.00 | Window Closed / Lapsed |