US3274984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic vacuum spoiler for internal combustion engines
Assignee: DOLFI JAMES J JR
•
Filing: 1963-05-17
•
Granted: 1966-09-27
•
Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Sr James J Dolfi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:25
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/001; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S261/00; Y10S261/19; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749; Y10T137/7752
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1324436A
Cited
US2356134A
Cited
US2314141A
Cited
US2433205A
Cited
US2793001A
Cited
US2969800A
Cited
US2913220A
Cited
US3034492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |