US2643677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for operating rotary valves
Assignee: OHIO INJECTOR CO
•
Filing: 1948-09-14
•
Granted: 1953-06-30
•
Expires: 1968-09-14
Abstract
No abstract record available.
Inventors
- 👤 Allen D Maclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:44
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/16; F16K31/163; F16K31/1635
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2001620A
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US2085688A
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US2154038A
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US2187036A
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US2149725A
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US2352390A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |