US2918045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double acting two stroke cycle internal combustion engine
Assignee: Individual
•
Filing: 1957-02-06
•
Granted: 1959-12-22
•
Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:46
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/02; F02B33/06; F02B33/10; F02B33/14; F02B75/00; F02B75/002; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US288396A
Cited
US886846A
Cited
US1175017A
Cited
US1099860A
Cited
US2102559A
Cited
US2123569A
Cited
US2256437A
Cited
US2780208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |