US2671632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston valve
Assignee: Maclaren Ltd
•
Filing: 1949-03-24
•
Granted: 1954-03-09
•
Expires: 1969-03-24
Abstract
No abstract record available.
Inventors
- 👤 Wofford Catherine Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:03
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759; Y10T137/86791; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/18896; Y10T74/18992
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1735511A
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US1847073A
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US1800243A
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US1953433A
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US1927609A
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US1922928A
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US2010500A
Cited
US2226611A
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US2209418A
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US2327366A
Cited
US2525487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |