Patent US2372920A successfully refreshed from Google Patents.
US2372920A
Expired / Lapsed
US
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Valve for pneumatic tools
Assignee: CHARLES CROFTON AND Co (ENGINEERS) Ltd
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Filing: 1942-05-05
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Granted: 1945-04-03
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Expires: 1962-05-05
Abstract
No abstract record available.
Inventors
- 👤 Wiles Robert Clough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:22
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/14; B25D9/16; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4252; Y10T137/8593; Y10T137/87169
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) | 1948-04-02 | 1948-10-02 | 1949-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-02 | 1952-10-02 | 1953-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-02 | 1956-10-02 | 1957-04-03 | $7700.00 | Window Closed / Lapsed |