Patent US3070149A successfully refreshed from Google Patents.
US3070149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-low fuel burning systems in conjunction with plural fire chambers
Assignee: Individual
•
Filing: 1958-01-23
•
Granted: 1962-12-25
•
Expires: 1978-01-23
Abstract
No abstract record available.
Inventors
- 👤 William R Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:25
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1610007A
Cited
US1670626A
Cited
US1637820A
Cited
US1835611A
Cited
US1938089A
Cited
US2039910A
Cited
US2196377A
Cited
US2172105A
Cited
US2286296A
Cited
US2308555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |