Patent US2804869A successfully refreshed from Google Patents.
US2804869A
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Horizontal warm air furnace
Assignee: BESSER METAL PRODUCTS Corp
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Filing: 1952-12-17
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Granted: 1957-09-03
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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 16:37
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US73502A
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US490531A
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GB190626244A
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US1197672A
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US1559521A
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US2259187A
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US2231227A
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US2302859A
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US2383431A
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US2498362A
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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 |