US2521176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve gear for operating poppet valves of internal-combustion engines
Assignee: Worthington Pump and Machinery Corp
•
Filing: 1947-09-16
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Granted: 1950-09-05
•
Expires: 1967-09-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur O Kutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:57
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/16; F01L1/26; F02; F02B; F02B2275/00; F02B2275/20; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02F2001/244; F02F2001/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1687911A
Cited
US1696866A
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US1798938A
Cited
US1905888A
Cited
US2054928A
Cited
US1996807A
Cited
US2380051A
Cited
US2411775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |