US2921567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slot-controlled two-stroke cycle internal combustion engine
Assignee: Kloeckner Humboldt Deutz AG
•
Filing: 1957-05-22
•
Granted: 1960-01-19
•
Expires: 1977-05-22
Abstract
No abstract record available.
Inventors
- 👤 Medenus Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:33
CPC Classifications
F; F02; F02B; F02B25/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2720/00; F02B2720/23; F02B2720/236; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2057062A
Cited
US2115180A
Cited
US2265677A
Cited
US2252914A
Cited
DE726317C
Cited
US2654355A
Cited
GB718661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |