US2816529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled internal combustion engine
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1955-04-25
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Granted: 1957-12-17
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Expires: 1975-04-25
Abstract
No abstract record available.
Inventors
- 👤 Emil R Flatz
- 👤 Margareta E Hovel
- 👤 Martin P Roggendorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:59
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/18; F02F1/22; F02F1/02; F02F1/04; F02F1/06; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |