Patent US3534723A successfully refreshed from Google Patents.
US3534723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diesel engine manifold air preheater and starting system system employing the same
Assignee: Stewart Warner Corp
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Filing: 1968-03-11
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Granted: 1970-10-20
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Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Vernon N Tramontini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:36
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)
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 |