Patent US1158554A successfully refreshed from Google Patents.
US1158554A
Expired / Lapsed
US
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Rotary-piston engine.
Assignee: UNIVERSAL SPEED CONTROL Co
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Filing: 1915-03-31
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Granted: 1915-11-02
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Expires: 1935-03-31
Abstract
No abstract record available.
Inventors
- 👤 Charles R Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:26
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/10; F01B3/103; F01B3/104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1918-11-01 | 1919-05-03 | 1919-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-11-01 | 1923-05-03 | 1923-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-11-01 | 1927-05-03 | 1927-11-02 | $7700.00 | Window Closed / Lapsed |