US3077920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace with gas burner
Assignee: Preway Inc
•
Filing: 1960-05-11
•
Granted: 1963-02-19
•
Expires: 1980-05-11
Abstract
No abstract record available.
Inventors
- 👤 Casimir J Pavlak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:50
CPC Classifications
F; F23; F23D; F23D5/00; F23D99/00; F23D99/002; F23D99/004; F23D2206/00; F23D2206/0094
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2443933A
Cited
US1682587A
Cited
US1860311A
Cited
US2187010A
Cited
US2335471A
Cited
US2424154A
Cited
US2655987A
Cited
US2713388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |