Patent US1852582A successfully refreshed from Google Patents.
US1852582A
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Valve
Assignee: Ingersoll Rand Co
•
Filing: 1929-08-02
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Granted: 1932-04-05
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Expires: 1949-08-02
Abstract
No abstract record available.
Inventors
- 👤 Longacre Frederick Van Duzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:59
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7852
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) | 1935-04-05 | 1935-10-05 | 1936-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-05 | 1939-10-05 | 1940-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-05 | 1943-10-05 | 1944-04-05 | $7700.00 | Window Closed / Lapsed |