Patent US2863443A successfully refreshed from Google Patents.
US2863443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire place conversion unit
Assignee: Individual
•
Filing: 1955-07-08
•
Granted: 1958-12-09
•
Expires: 1975-07-08
Abstract
No abstract record available.
Inventors
- 👤 Hoffman John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:46
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885; F24B1/189; F24B1/19; F24B1/1902
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US660357A
Cited
US737382A
Cited
US817900A
Cited
GB190918077A
Cited
US1620235A
Cited
US1649881A
Cited
US1588587A
Cited
US1681995A
Cited
US2093492A
Cited
US2453954A
Cited
US2743720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |