US2533442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder head structure for internal-combustion engines
Assignee: Individual
•
Filing: 1948-06-15
•
Granted: 1950-12-12
•
Expires: 1968-06-15
Abstract
No abstract record available.
Inventors
- 👤 William V Falcon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:14
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/26; F02F1/36; F02F1/40; F02B; F02B2275/00; F02B2275/34; F02B3/00; F02B3/06; F02F2001/244; F02F2001/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1233964A
Cited
US1226595A
Cited
US1526744A
Cited
US2033350A
Cited
US2085810A
Cited
US2089277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |