US3534714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark ignition for internal combustion engine
Assignee: MAN AG
•
Filing: 1968-09-18
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Granted: 1970-10-20
•
Expires: 1988-09-18
Abstract
No abstract record available.
Inventors
- 👤 Alfred Urlaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/08; F02B23/10; F02B23/104; F02B23/02; F02B23/06; F02B23/0675; F02B23/101; F02B1/00; F02B1/02; F02B1/08; F02B2275/00; F02B2275/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |