US2808893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superchargers for engines of automotive vehicles
Assignee: Individual
•
Filing: 1953-06-24
•
Granted: 1957-10-08
•
Expires: 1973-06-24
Abstract
No abstract record available.
Inventors
- 👤 Harley A Dorman
- 👤 Douglas P Dorman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:28
CPC Classifications
F; F02; F02B; F02B33/00; F02M; F02M2700/00; F02M2700/33; F02M2700/331; Y; Y10; Y10S; Y10S55/00; Y10S55/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2150295A
Cited
US2196332A
Cited
US2197503A
Cited
US2203407A
Cited
US2267706A
Cited
US2299157A
Cited
US2701024A
Cited
US2670055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |