Patent US3518976A successfully refreshed from Google Patents.
US3518976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for controlling valve-open time of internal combustion engines
Assignee: NIEL C THUESEN
•
Filing: 1968-11-29
•
Granted: 1970-07-07
•
Expires: 1988-11-29
Abstract
No abstract record available.
Inventors
- 👤 Niel C Thuesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:52
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; F01L1/12; F01L1/14; F01L1/146; F01L1/34; F01L13/00; F01L13/0015; F01L13/0031; F01L1/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2305787A
Cited
US2484109A
Cited
US2494183A
Cited
US2780912A
Cited
US2804061A
Cited
US2931347A
Cited
US3066659A
Cited
US3382854A
Cited
US3361122A
Cited
US3404666A
Cited
US3439661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |