US3408992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine and process utilizing heated auxiliary air to obtain complete combustion
Assignee: Individual
•
Filing: 1966-12-13
•
Granted: 1968-11-05
•
Expires: 1986-12-13
Abstract
No abstract record available.
Inventors
- 👤 Seggern Ernest A Von
- 👤 Seggern Henry E Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:14
CPC Classifications
F; F02; F02B; F02B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1643396A
Cited
US1766854A
Cited
US1955661A
Cited
US2230740A
Cited
US2242990A
Cited
US3211137A
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 |