US2844157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electropneumatic transducer
Assignee: Celanese Canada Inc
•
Filing: 1954-06-04
•
Granted: 1958-07-22
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Griffith Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:50
CPC Classifications
F; F16; F16K; F16K31/00; F15; F15B; F15B5/00; F15B5/003; Y; Y10; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US901613A
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US1389056A
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US1887322A
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US1973769A
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US2253963A
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US2288912A
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US2261462A
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US2625136A
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US2577680A
Cited
US2759459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |