US2480633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder and cylinder head construction
Assignee: Individual
•
Filing: 1947-02-28
•
Granted: 1949-08-30
•
Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Niels A Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:15
CPC Classifications
F; F16; F16J; F16J10/00; F16J10/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US275269A
Cited
GB190808736A
Cited
US1605075A
Cited
US1770528A
Cited
US1859436A
Cited
US1819414A
Cited
US2227838A
Cited
US2299613A
Cited
US2389849A
Cited
US2299695A
Cited
US2349170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |