Patent US3742176A successfully refreshed from Google Patents.
US3742176A
Expired / Lapsed
US
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Method for preventing the leakage of microwave energy from microwave heating oven
Assignee: TDK Corp
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Filing: 1970-06-22
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Granted: 1973-06-26
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Expires: 1990-06-22
Abstract
Abstract The object of the present invention is to provide a method for preventing the leakage of microwave energy through the gap between the oven and the door during the operation of the microwave heating device, and the object of the present invention can be attained by placing ferromagnetic material, i.e., a mixture mainly composed of ferrite powder in the path of waveleakage.
Inventors
- 👤 T Ishino
- 👤 N Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:20
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/76; H05B6/763
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
A method according to claim 1 wherein said ferromagnetic material is a mixture prepared by mixing of 2 to 8 parts by weight of the powder of ferrite to one part by weight of said organic high molecular compound.
References Cited (Backward Citations)
US2956143A
Cited
US2958754A
Cited
US3196242A
Cited
US3242303A
Cited
US3511957A
Cited
US3436508A
Cited
US3525841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |