Patent US3614948A successfully refreshed from Google Patents.
US3614948A
Expired / Lapsed
US
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Space heater
Assignee: VANN IND Inc
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Filing: 1968-12-20
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Granted: 1971-10-26
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Expires: 1988-12-20
Abstract
Abstract A SPACE HEATER COMPRISING A CASING DEFINING A COMBUSTION CHAMBER, THE CASING HAVING AN INLET OPENING AND AN OUTLET OPENING, A BURNER UNIT MOUNTED IN THE COMBUSTION CHAMBER, FIRST BAFFLE MEANS DISPOSED IN THE COMBUSTION CHAMBER BETWEEN THE BURNER UNIT AND THE OUTLET OPENING DIRECTING AIR HEATED BY THE BURNER UNIT LONGITUDINALLY AND SECOND BAFFLE MEANS DISPOSED BETWEEN THE BURNER UNIT AND THE OUTLET OPENING DIRECTING AIR HEATED BY THE BURNER UNIT TRANSVERSELY.
Inventors
- 👤 Walter F Jackson
- 👤 James F Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:34
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/002; F24C3/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |