US1209390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary-valve mechanism for internal-combustion engines.
Assignee: Individual
•
Filing: —
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Granted: 1916-12-19
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Expires: 1933-12-19
Abstract
No abstract record available.
Inventors
- 👤 Julian S Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:18
CPC Classifications
F; F01; F01L; F01L7/00; F01L7/02; F01L7/026
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) | 1919-12-19 | 1920-06-19 | 1920-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-12-19 | 1924-06-19 | 1924-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-12-19 | 1928-06-19 | 1928-12-19 | $7700.00 | Window Closed / Lapsed |