US3418981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion chamber and process utilizing a diffused mixture and auxiliary air
Assignee: Individual
•
Filing: 1967-11-14
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Granted: 1968-12-31
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Expires: 1987-11-14
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
2026-10-27 12:20
CPC Classifications
F; F02; F02B; F02B17/00; F02B1/00; F02B1/02; F02B1/04; F02B1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |