Patent US4972456A successfully refreshed from Google Patents.
US2846983A
Expired / Lapsed
US
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Single acting motor with pneumatic return spring
Assignee: Johnson Service Co
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Filing: 1955-04-14
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Granted: 1958-08-12
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Expires: 1975-04-14
Abstract
No abstract record available.
Inventors
- 👤 Carl A Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:41
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; F01; F01B; F01B19/00; F01B19/04
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |