Patent US3249731A successfully refreshed from Google Patents.
US3249731A
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US
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Oven
Assignee: Westinghouse Electric Corp
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Filing: 1963-11-14
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Granted: 1966-05-03
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Expires: 1983-11-14
Abstract
No abstract record available.
Inventors
- 👤 Stewart C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:33
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/76; H05B6/763; F; F24; F24C; F24C15/00; F24C15/02; F24C15/021; H05K; H05K9/00; H05K9/0007; H05K9/0015
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
IN APPARATUS FOR HEATING MATERIALS IN AN ENCLOSURE SUPPLIED WITH MICROWAVE ENERGY AND DEFINED BY A HOUSING MEMBER HAVING A CONDUCTIVE INTERIOR SURFACE WITH AN OPENING THEREIN, A COVERING CLOSURE MEMBER FOR THE OPENING HAVING A CONDUCTIVE PORTION OVERLAPPING INTO BUT SPACED FROM THE SURFACE OF THE HOUSING MEMBER AROUND THE OPENING, THE EXTENT OF OVERLAP BEING EQUIVALENT TO AN ODD NUMBER OF QUARTER WAVELENGTHS OF THE MICROWAVE ENERGY, SAID CLOSURE MEMBER HAVING A RECESSED CONDUCTIVE PORTION COMMUNICATING WITH THE SPACE BETWEEN THE OVERLAPPING PORTIONS AND CONSTITUTING A STRAIGHT LINE CONTINUATION OF S AID SPACE, THE DEPTH OF THE RECESS BEING EQUIVALENT TO AN ODD NUMBER OF QUARTER WAVELENGTHS, AND A GASKET COMPRISING LOSSY DIELECTRIC MATERIAL ON ONE OF THE MEMBERS AND INTERPOSED BETWEEN THE RESPECTIVE MEMBERS ALONG THE OUTSIDE OF THE JUNCTION BETWEEN THE SPACE AND THE RECESS, SAID GASKET EXTENDING ENTIRELY AROUND SAID OPENING TO PREVENT CONDUCTIVE CONTACT BETWEEN SAID RESPECTIVE MEMBERS ALONG SAID OUTSIDE OF SAID JUNCTION.
Claim 2
Dependent Claim
160 words
IN APPARATUS FOR HEATING MATERIALS IN AN ENCLOSURE SUPPLIED WITH MICROWAVE ENERGY AND DEFINED BY A HOUSING MEMBER HAVING A CONDUCTIVE INTERIOR SURFACE WITH AN OPENING THEREIN, A COVERING CLOSURE MEMBER FOR THE OPENING HAVING A CONDUCTIVE PORTION OVERLAPPING INTO BUT SPACED FROM THE SURFACE OF THE HOUSING MEMBER AROUND THE OPENING, THE EXTENT OF OVERLAP BEING EQUIVALENT TO AN ODD NUMBER OF QUARTER WAVELENGTHS OF THE MICROWAVE ENERGY, SAID CLOSURE MEMBER HAVING A RECESSED CONDUCTIVE PORTION COMMUNICATING WITH THE SPACE BETWEEN THE OVERLAPPING PORTIONS AND CONSTITUTING A STRAIGHT LINE CONTINUATION OF S AID SPACE, THE DEPTH OF THE RECESS BEING EQUIVALENT TO AN ODD NUMBER OF QUARTER WAVELENGTHS, AND A GASKET COMPRISING LOSSY DIELECTRIC MATERIAL ON ONE OF THE MEMBERS AND INTERPOSED BETWEEN THE RESPECTIVE MEMBERS ALONG THE OUTSIDE OF THE JUNCTION BETWEEN THE SPACE AND THE RECESS, SAID GASKET EXTENDING ENTIRELY AROUND SAID OPENING TO PREVENT CONDUCTIVE CONTACT BETWEEN SAID RESPECTIVE MEMBERS ALONG SAID OUTSIDE OF SAID JUNCTION.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |