US2638874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatically-operated control instrument with follow-up
Assignee: Taylor Instrument Co
•
Filing: 1950-03-17
•
Granted: 1953-05-19
•
Expires: 1970-03-17
Abstract
No abstract record available.
Inventors
- 👤 Elliot H Woodhull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:49
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/44; G05B11/48; G05B11/50; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2117800A
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US2292761A
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US2299884A
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US2440183A
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US2400048A
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US2475894A
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US2443891A
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US2484557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |