US2726646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaseous fluid operated prime mover with rotary sleeve valve assembly
Assignee: Individual
•
Filing: 1952-02-07
•
Granted: 1955-12-13
•
Expires: 1972-02-07
Abstract
No abstract record available.
Inventors
- 👤 Robert B Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:35
CPC Classifications
F; F01; F01L; F01L7/00; F01L7/02; F01L7/027; F02; F02B; F02B33/00; F02B33/02; F02B33/06; F02B33/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US298063A
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US727752A
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US748045A
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US939376A
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US1072308A
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US1559417A
Cited
US1530881A
Cited
US1578581A
Cited
US1579296A
Cited
US1633851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |