US2642848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air valve mechanism for controlling the operation of pneumatic devices and the like
Assignee: Snap On Inc
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Filing: 1947-09-23
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Granted: 1953-06-23
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Expires: 1967-09-23
Abstract
No abstract record available.
Inventors
- 👤 George M Walraven
- 👤 Raymond G Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/122; F16K31/1225; F01; F01B; F01B17/00; F01B17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |