US1224447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism.
Assignee: Individual
•
Filing: 1916-04-11
•
Granted: 1917-05-01
•
Expires: 1936-04-11
Abstract
No abstract record available.
Inventors
- 👤 Armistead C Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:40
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/102; F04B39/1033; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838
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) | 1920-04-30 | 1920-10-30 | 1921-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-04-30 | 1924-10-30 | 1925-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-04-30 | 1928-10-30 | 1929-05-01 | $7700.00 | Window Closed / Lapsed |