US1285835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary internal-combustion engine.
Assignee: SUNDERMAN Corp
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Filing: 1916-01-26
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Granted: 1918-11-26
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Expires: 1936-01-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Sunderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:27
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/26; F02B75/265; F01; F01B; F01B13/00; F01B13/04; F01B13/045; F01B13/06; F01B13/068; F02B57/00; F02B57/08; F02B75/02; F02B2075/022; F02B2075/027; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1816
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) | 1921-11-25 | 1922-05-27 | 1922-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-11-25 | 1926-05-27 | 1926-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-11-25 | 1930-05-27 | 1930-11-26 | $7700.00 | Window Closed / Lapsed |