US2720193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil cooled piston for high speed internal combustion engines
Assignee: Individual
•
Filing: 1950-10-24
•
Granted: 1955-10-11
•
Expires: 1970-10-24
Abstract
No abstract record available.
Inventors
- 👤 Maybach Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:32
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/0015; F02F3/0023; F02F3/16; F02F3/20; F02F3/22; F02B; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0433; F05C2201/0448
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR520241A
Cited
GB192759A
Cited
FR634700A
Cited
FR33893E
Cited
GB487377A
Cited
US2266192A
Cited
US2282085A
Cited
US2369907A
Cited
US2449657A
Cited
CH238210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |