US2639699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-cycle engine and improved crankcase induction means therefor
Assignee: Individual
•
Filing: 1951-09-01
•
Granted: 1953-05-26
•
Expires: 1971-09-01
Abstract
No abstract record available.
Inventors
- 👤 Elmer C Kiekhaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
F; F02; F02B; F02B33/00; F16; F16K; F16K15/00; F16K15/14; F16K15/1401; F16K15/16; F02M; F02M2700/00; F02M2700/33; F02M2700/331; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7879; Y10T137/7888; Y10T137/7891
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1130526A
Cited
US1408385A
Cited
US2089366A
Cited
US2148071A
Cited
GB478399A
Cited
US2428199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |