US2952968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two cycle supercharging on port scavenged engines
Assignee: Nordberg Manufacturing Co
•
Filing: 1955-03-24
•
Granted: 1960-09-20
•
Expires: 1975-03-24
Abstract
No abstract record available.
Inventors
- 👤 Hans U Lieberherr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:58
CPC Classifications
F; F02; F02B; F02B25/00; F02B25/02; F02B25/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1330496A
Cited
US1046738A
Cited
US1160419A
Cited
US1301807A
Cited
US1384133A
Cited
US1741729A
Cited
US1788076A
Cited
US1869455A
Cited
US1839791A
Cited
US2097883A
Cited
US2292233A
Cited
US2293548A
Cited
GB566531A
Cited
US2401188A
Cited
US2509246A
Cited
US2670595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |