US1909974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism
Assignee: Ingersoll Rand Co
•
Filing: 1930-08-12
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Granted: 1933-05-23
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Expires: 1950-08-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick V D Longacre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/08; F16K15/10; F16K15/14; F16K15/148; F16K17/00; F16K17/02; F16K17/04; F16K17/0413; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7851; Y10T137/7859; Y10T137/786; Y10T137/7861; Y10T137/7862; Y10T137/7863; Y10T137/7864; Y10T137/7879; Y10T137/7888; Y10T137/789
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) | 1936-05-22 | 1936-11-21 | 1937-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-22 | 1940-11-21 | 1941-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-22 | 1944-11-21 | 1945-05-23 | $7700.00 | Window Closed / Lapsed |