US3408994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine
Assignee: Audi AG
•
Filing: 1966-05-05
•
Granted: 1968-11-05
•
Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Kraus Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:03
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4285; F02B; F02B23/00; F02B23/08; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02F2001/244; F02F2001/245; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB819431A
Cited
US1733696A
Cited
US1716095A
Cited
US1815868A
Cited
GB535065A
Cited
US2254438A
Cited
US2469448A
Cited
US2672852A
Cited
GB670181A
Cited
GB700364A
Cited
GB723711A
Cited
US3154059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |