US3470983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight valve lifter
Assignee: STEPHEN F BRIGGS
•
Filing: 1968-07-03
•
Granted: 1969-10-07
•
Expires: 1988-07-03
Abstract
No abstract record available.
Inventors
- 👤 Stephen F Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:09
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; F16; F16H; F16H53/00; F16H53/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB290507A
Cited
US1963614A
Cited
US1840633A
Cited
FR1020633A
Cited
US3073292A
Cited
US3151501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |