Patent US2551611A successfully refreshed from Google Patents.
Patent US1078170A successfully refreshed from Google Patents.
US1078170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary engine.
Assignee: Individual
•
Filing: 1913-02-28
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Granted: 1913-11-11
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Expires: 1933-02-28
Abstract
No abstract record available.
Inventors
- 👤 James Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:13
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/168
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) | 1916-11-10 | 1917-05-12 | 1917-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-11-10 | 1921-05-12 | 1921-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-11-10 | 1925-05-12 | 1925-11-11 | $7700.00 | Window Closed / Lapsed |