US2904028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preheating apparatus for internal-combustion engines
Assignee: MAN AG
•
Filing: 1956-06-07
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Granted: 1959-09-15
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Expires: 1976-06-07
Abstract
No abstract record available.
Inventors
- 👤 Meurer Siegfried
- 👤 Merkel Erich
- 👤 Liebel Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:24
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/06; F02N19/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1431910A
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US1386038A
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US1679521A
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US2044113A
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US1982866A
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US2229714A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |