US2495784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control for crankcase compression engines
Assignee: Duncan Parking Meter Corp
•
Filing: 1945-11-21
•
Granted: 1950-01-31
•
Expires: 1965-11-21
Abstract
No abstract record available.
Inventors
- 👤 Starts Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:28
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/28; F02F1/30; F02F1/305; F02B75/02; F02B2075/022; F02B2075/027; F02B2275/00; F02B2275/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US659944A
Cited
US1091963A
Cited
US1490305A
Cited
US1445319A
Cited
US1554618A
Cited
GB162464A
Cited
FR524268A
Cited
US1610846A
Cited
FR602432A
Cited
US2391380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |