US3280577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic defrosting control device
Assignee: Panasonic Holdings Corp
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Filing: 1964-10-07
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Granted: 1966-10-25
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Expires: 1984-10-07
Abstract
No abstract record available.
Inventors
- 👤 Kobayashi Tsuneo
- 👤 Namikawa Shunji
- 👤 Katagiri Toshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:12
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/02; F25B; F25B2700/00; F25B2700/11; F25B2700/111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN AUTOMATIC DEFROSTING CONTROL SYSTEM FOR AN EVAPORATOR COMPRISING A PHOTOSENSITIVE MEMBER MOUNTED ON SAID EVAPORATOR, A LIGHT-RECEIVING FACE OF SAID PHOTOSENSITIVE MEMBER HAVING A FROSTING ACCELERATIVE PLATE SO THAT SAID LIGHT-RECEIVING FACE MAY BE FROSTED ALONG WITH SAID EVAPORATOR, A LIGHT SOURCE DISPOSED IN OPPOSITION TO SAID LIGHT-RECEIVING FACE, MEANS FOR PRODUCING ELECTRICAL CHANGES IN RESPONSE TO THE LIGHT THROUGH SAID LIGHT-RECEIVING FACE DUE TO THE IRRADIATION OF A PHOTOSENSITIVE ELEMENT OF SAID PHOTOSENSITIVE MEMBER, AND MEANS FOR CONTROLLING A DEFROSTING OPERATION IN RESPONSE TO SAID ELECTRICAL CHANGES.
Claim 2
Dependent Claim
89 words
AN AUTOMATIC DEFROSTING CONTROL SYSTEM FOR AN EVAPORATOR COMPRISING A PHOTOSENSITIVE MEMBER MOUNTED ON SAID EVAPORATOR, A LIGHT-RECEIVING FACE OF SAID PHOTOSENSITIVE MEMBER HAVING A FROSTING ACCELERATIVE PLATE SO THAT SAID LIGHT-RECEIVING FACE MAY BE FROSTED ALONG WITH SAID EVAPORATOR, A LIGHT SOURCE DISPOSED IN OPPOSITION TO SAID LIGHT-RECEIVING FACE, MEANS FOR PRODUCING ELECTRICAL CHANGES IN RESPONSE TO THE LIGHT THROUGH SAID LIGHT-RECEIVING FACE DUE TO THE IRRADIATION OF A PHOTOSENSITIVE ELEMENT OF SAID PHOTOSENSITIVE MEMBER, AND MEANS FOR CONTROLLING A DEFROSTING OPERATION IN RESPONSE TO SAID ELECTRICAL CHANGES.
References Cited (Backward Citations)
US3120108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |