US3489500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel burner recycling control
Assignee: Electronics Corp of America
•
Filing: 1968-03-18
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Granted: 1970-01-13
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Expires: 1988-03-18
Abstract
No abstract record available.
Inventors
- 👤 Phillip Giuffrida
- 👤 Elihu Craig Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:45
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/203; F23N2227/00; F23N2227/04; F23N2227/28; F23N2227/30; F23N2229/00; F23N2231/00; F23N2231/06; F23N2233/00; F23N2233/06; F23N5/02; F23N5/08; F23N5/18
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) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |