US3704703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooking oven
Assignee: Rinnai Corp
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Filing: 1971-03-29
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Granted: 1972-12-05
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Expires: 1991-03-29
Abstract
Abstract An oven has a heating chamber with a front door providing access thereto and beneath a separating plate at the bottom of the heating chamber is a burner chamber containing a burner. The separating plate has an opening above the burner and a detachable cover is mounted at the opening and has a window of heatresistant plate glass to permit viewing of the burner and its condition of operation.
Inventors
- 👤 Tadayoshi Takase
- 👤 Sueo Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:13
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/02; F24C3/027
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
An oven comprising a heating chamber, a burner chamber below the heating chamber, a separating plate between the heating chamber and the burner chamber, said plate having an opening therein, a burner in said burner chamber below said opening, and a detachable cover supported on the separating plate for covering said opening, said cover having a window of light permeable material therein for viewing the interior of said burner chamber, said separating plate including an upwardly deformed lip surrounding said opening and said cover including a corresponding downwardly deformed lip engageable around the lip on the separating plate to cover the same.
Claim 2
Dependent Claim
102 words
An oven comprising a heating chamber, a burner chamber below the heating chamber, a separating plate between the heating chamber and the burner chamber, said plate having an opening therein, a burner in said burner chamber below said opening, and a detachable cover supported on the separating plate for covering said opening, said cover having a window of light permeable material therein for viewing the interior of said burner chamber, said separating plate including an upwardly deformed lip surrounding said opening and said cover including a corresponding downwardly deformed lip engageable around the lip on the separating plate to cover the same.
Claim 3
Dependent Claim
53 words
An oven as claimed in claim 1 wherein said heating chamber is open at the front and said oven comprises an openable door closing the front of the heating chamber, said separating plate having an opening at the rear thereof for passage of heated air from said burner chamber into said heating chamber.
Claim 4
Dependent Claim
22 words
An oven as claimed in claim 2 comprising air exhaust means leading from said heating chamber to the exterior of the oven.
Claim 5
Dependent Claim
27 words
An oven as claimed in claim 3 wherein said air exhaust means comprises an outlet conduit leading from the heating chamber to the exterior of the oven.
Claim 6
Dependent Claim
19 words
An oven as claimed in claim 4 wherein said outlet conduit is at the rear of the heating chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |