US3147689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic electric egg cooker
Assignee: Panasonic Holdings Corp
•
Filing: 1962-05-14
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Granted: 1964-09-08
•
Expires: 1982-05-14
Abstract
No abstract record available.
Inventors
- 👤 Sakamoto Tatsunosuke
- 👤 Inoue Shojiro
- 👤 Sano Yoshiaki
- 👤 Nakahara Satoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:30
CPC Classifications
A; A47; A47J; A47J29/00; A47J29/02; H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
228 words
AN AUTOMATIC ELECTRIC EGG COOKER COMPRISING A BOILING POT ADAPTED FOR HOLDING A SUPPLY OF HEATING WATER AND EGGS AND HAVING A SPHERICALLY-SHAPED BOTTOM WALL, ELECTRIC HEATER MEANS AT THE LOWEST PORTION OF SAID BOTTOM WALL OF SAID BOILING POT; A THERMOSTATIC SWITCH INCLUDING A MAGNET, A MAGNETIC ELEMENT, ELECTRIC CONTACTS ARRANGED TO OPEN AND CLOSE UPON ENGAGEMENT AND DISENGAGEMENT OF SAID MAGNET AND SAID MAGNETIC ELEMENT AND A RESILIENT ELEMENT OPERABLE TO SEPARATE AND DISENGAGE SAID MAGNET AND SAID MAGNETIC ELEMENT FROM EACH OTHER, SAID THERMOSTATIC SWITCH BEING OPERABLE TO CONTROL SAID HEATER MEANS IN RESPONSE TO THE TEMPERATURE OF THE BOTTOM OF THE POT WHICH RAPIDLY RISES UPON VAPORIZATION OF ALL SAID SUPPLY OF HEATING WATER, A WATER TANK DETACHABLY SECURED TO THE TOP OPENING OF SAID BOILING POT TO ACCOMMODATE A SUPPLY OF COOLING WATER FOR COOLING THE BOILED EGGS, A HEAT-SHIELDING PLATE INTERPOSED BETWEEN SAID BOILING POT AND SAID WATER TANK WITH A HEAT-INSULATING SPACE DEFINED THEREBETWEEN AND COVERING THE TOP OPENING OF SAID BOILING POT IN GAS-TIGHT SEALING RELATION, MEANS FOR INTRODUCING A SUPPLY OF COOLING WATER INTO SAID BOILING POT BY UTILIZATION OF A PARTIAL VACUUM FORMED IN SAID BOILING POT AS THE RESULT OF THE DISSIPATION OF STEAM FROM SAID BOILING POT WHEN SAID HEATING WATER THEREIN IS HEATED AND SAID BOILING POT COOLS DOWN AFTER THE OPERATION OF SAID THER-
Claim 2
Dependent Claim
228 words
AN AUTOMATIC ELECTRIC EGG COOKER COMPRISING A BOILING POT ADAPTED FOR HOLDING A SUPPLY OF HEATING WATER AND EGGS AND HAVING A SPHERICALLY-SHAPED BOTTOM WALL, ELECTRIC HEATER MEANS AT THE LOWEST PORTION OF SAID BOTTOM WALL OF SAID BOILING POT; A THERMOSTATIC SWITCH INCLUDING A MAGNET, A MAGNETIC ELEMENT, ELECTRIC CONTACTS ARRANGED TO OPEN AND CLOSE UPON ENGAGEMENT AND DISENGAGEMENT OF SAID MAGNET AND SAID MAGNETIC ELEMENT AND A RESILIENT ELEMENT OPERABLE TO SEPARATE AND DISENGAGE SAID MAGNET AND SAID MAGNETIC ELEMENT FROM EACH OTHER, SAID THERMOSTATIC SWITCH BEING OPERABLE TO CONTROL SAID HEATER MEANS IN RESPONSE TO THE TEMPERATURE OF THE BOTTOM OF THE POT WHICH RAPIDLY RISES UPON VAPORIZATION OF ALL SAID SUPPLY OF HEATING WATER, A WATER TANK DETACHABLY SECURED TO THE TOP OPENING OF SAID BOILING POT TO ACCOMMODATE A SUPPLY OF COOLING WATER FOR COOLING THE BOILED EGGS, A HEAT-SHIELDING PLATE INTERPOSED BETWEEN SAID BOILING POT AND SAID WATER TANK WITH A HEAT-INSULATING SPACE DEFINED THEREBETWEEN AND COVERING THE TOP OPENING OF SAID BOILING POT IN GAS-TIGHT SEALING RELATION, MEANS FOR INTRODUCING A SUPPLY OF COOLING WATER INTO SAID BOILING POT BY UTILIZATION OF A PARTIAL VACUUM FORMED IN SAID BOILING POT AS THE RESULT OF THE DISSIPATION OF STEAM FROM SAID BOILING POT WHEN SAID HEATING WATER THEREIN IS HEATED AND SAID BOILING POT COOLS DOWN AFTER THE OPERATION OF SAID THER-
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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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |