Patent US1849566A successfully refreshed from Google Patents.
US1849566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage two-stroke internal combustion engine
Assignee: Individual
•
Filing: 1928-07-16
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Granted: 1932-03-15
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Expires: 1948-07-16
Abstract
No abstract record available.
Inventors
- 👤 Brunnschweiler Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:49
CPC Classifications
F; F02; F02B; F02B41/00; F02B41/02; F02B41/06; F02B25/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2700/00; F02B2700/03; F02B2700/031
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) | 1935-03-15 | 1935-09-14 | 1936-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-03-15 | 1939-09-14 | 1940-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-03-15 | 1943-09-14 | 1944-03-15 | $7700.00 | Window Closed / Lapsed |