US2804869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal warm air furnace
Assignee: BESSER METAL PRODUCTS Corp
•
Filing: 1952-12-17
•
Granted: 1957-09-03
•
Expires: 1972-12-17
Abstract
No abstract record available.
Inventors
- 👤 Charles S Besser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:43
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)
US73502A
Cited
US490531A
Cited
GB190626244A
Cited
US1197672A
Cited
US1559521A
Cited
US2259187A
Cited
US2231227A
Cited
US2302859A
Cited
US2383431A
Cited
US2498362A
Cited
US2573651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |