Patent US1172121A successfully refreshed from Google Patents.
US1172121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine-valve.
Assignee: Individual
•
Filing: 1915-03-31
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Granted: 1916-02-15
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Expires: 1935-03-31
Abstract
No abstract record available.
Inventors
- 👤 Francis F Emory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:42
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/044; B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/052; B60G17/0523; B60G17/0525; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86919; Y10T137/87056; Y10T137/87064
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) | 1919-02-14 | 1919-08-16 | 1920-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-02-14 | 1923-08-16 | 1924-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-02-14 | 1927-08-16 | 1928-02-15 | $7700.00 | Window Closed / Lapsed |