US2561100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace construction involving removable combustion chamber housing
Assignee: Perfection Stove Co
•
Filing: 1946-10-04
•
Granted: 1951-07-17
•
Expires: 1966-10-04
Abstract
No abstract record available.
Inventors
- 👤 John A Dahlstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:20
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1725510A
Cited
US2160264A
Cited
US2209913A
Cited
US2219276A
Cited
US2228602A
Cited
US2288028A
Cited
US2370795A
Cited
US2355896A
Cited
US2378485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |