US4853509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rice cooker for microwave ranges
Assignee: HARIO KODENMA-CHO 15-18 NIHONBASHI CHUO-KU TOKYO A CORP OF JAPAN KK
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Filing: 1988-05-19
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Granted: 1989-08-01
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Expires: 2008-05-19
Abstract
Abstract A rice cooker for preparation of shaped foods of rice in a microwave range is made of microwave permeable synthetic resin such as polypropylene and internally provided with mutually separate confined spaces of a fixed capacity and adapted for accommodating rice with water. As the rice cooker containing uncooked rice with water is heated in the microwave range, compression acts on the boiled rice due to pressure contact of the boiled rice swelled with water with walls defining the spaces and the boiled water is automatically shaped in the spaces. Absence of direct contact of the rice with user's hand during the process enables preparation of shaped foods of rice such as rice balls without any keen pain and blemish on the hands.
Inventors
- 👤 Tatsuo Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:47
CPC Classifications
A; A47; A47J; A47J43/00; A47J43/20; A47J36/00; A47J36/02; A47J36/027; A47J36/16; A47J36/20; Y; Y10; Y10S; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
258 words
A rice cooker for microwave ranges comprising: a microwave permeable bowl, a perforated, microwave permeable rice container detachable encased in said bowl and internally provided with at least two spaces suited for accommodating rice, and a lid closing the top open end of said bowl in detachable engagement with said rice container in which said rice container is made up of a pair of counterparts which are separable combined with each other in order to internally define said at least two spaces, and at least one of said counterparts is provided with at least one slit for passage of water therethrough in which said pair of counterparts are lower and upper trays, said lower tray includes an upstanding first center tube and a plurality of receptacles circumferentially juxtaposed around said first center tube, said first center tube is provided at its top end with a first thread and, near its bottom end, a plurality of circumferentially juxtaposed longitudinal slots, said upper tray is provided with a second center tube and a plurality of cover sections circumferentially juxtaposed around said second center tube, the number of said cover sections is equal to that of said receptacles so that each said cover section defines each said space in combination with each said receptacle, said second center tube is provided near its bottom end with water inlet opening in said spaces, and said lid is provided with a third center tube extending downwards and having an inner thread engageable with said thread on said first center tube on said lower tray.
Claim 2
Dependent Claim
258 words
A rice cooker for microwave ranges comprising: a microwave permeable bowl, a perforated, microwave permeable rice container detachable encased in said bowl and internally provided with at least two spaces suited for accommodating rice, and a lid closing the top open end of said bowl in detachable engagement with said rice container in which said rice container is made up of a pair of counterparts which are separable combined with each other in order to internally define said at least two spaces, and at least one of said counterparts is provided with at least one slit for passage of water therethrough in which said pair of counterparts are lower and upper trays, said lower tray includes an upstanding first center tube and a plurality of receptacles circumferentially juxtaposed around said first center tube, said first center tube is provided at its top end with a first thread and, near its bottom end, a plurality of circumferentially juxtaposed longitudinal slots, said upper tray is provided with a second center tube and a plurality of cover sections circumferentially juxtaposed around said second center tube, the number of said cover sections is equal to that of said receptacles so that each said cover section defines each said space in combination with each said receptacle, said second center tube is provided near its bottom end with water inlet opening in said spaces, and said lid is provided with a third center tube extending downwards and having an inner thread engageable with said thread on said first center tube on said lower tray.
Claim 3
Dependent Claim
39 words
A rice cooker as claimed in claim 1 in which said bowl is provided at its bottom with an inner projection, for receiving the bottom end of said first center tube on said lower tray over said inner projection.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |