US3228204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration control for defrosting
Assignee: Controls Company of America
•
Filing: 1963-07-03
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Granted: 1966-01-11
•
Expires: 1983-07-03
Abstract
No abstract record available.
Inventors
- 👤 Matthies Alan Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:53
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A DEFROST CONTROL FOR A REFRIGERATION SYSTEM OF THE TYPE HAVING REFRIGERATION AND DEFROST CYCLES, COMPRISING: CONTROL MEANS RESPONSIVE TO ITS AMBIENT TEMPERATURE AND OPERABLE TO BE ACTUATED UPON CHANGE IN SAID AMBIENT TEMPERATURE PAST A PREDETERMINED TEMPERATURE LEVEL, SAID CONTROL MEANS ADAPTED TO BE CONNECTED TO A REFRIGERATION SYSTEM AND TO AFFECT THE CYCLING OF THE REFRIGERATION SYSTEM UPON ACTUATION OF SAID CONTROL MEANS; A SENSING MEANS OPERABLE TO INDICATE FROST ACCUMULATION CONDITIONS OF THE REFRIGERTION SYSTEM; AND TEMPERATURE CONTROL MEANS RESPONSIVE TO SAID SENSING MEANS AND MAINTAINING SAID AMBIENT TEMPERATURE AT A LEVEL OTHER THAN SAID PREDETERMINED LEVEL, SAID TEMPERATURE CONTROL MEANS CAUSING SAID AMBIENT TEMPERATURE TO CHANGE PAST SAID PREDETERMINED LEVEL WHEN SAID SENSING MEANS INDICATES A PREDETERMINED FROST ACCUMULATION CONDITION TO THEREBY ACTUATE SAID CONTROL MEANS.
Claim 2
Dependent Claim
130 words
A DEFROST CONTROL FOR A REFRIGERATION SYSTEM OF THE TYPE HAVING REFRIGERATION AND DEFROST CYCLES, COMPRISING: CONTROL MEANS RESPONSIVE TO ITS AMBIENT TEMPERATURE AND OPERABLE TO BE ACTUATED UPON CHANGE IN SAID AMBIENT TEMPERATURE PAST A PREDETERMINED TEMPERATURE LEVEL, SAID CONTROL MEANS ADAPTED TO BE CONNECTED TO A REFRIGERATION SYSTEM AND TO AFFECT THE CYCLING OF THE REFRIGERATION SYSTEM UPON ACTUATION OF SAID CONTROL MEANS; A SENSING MEANS OPERABLE TO INDICATE FROST ACCUMULATION CONDITIONS OF THE REFRIGERTION SYSTEM; AND TEMPERATURE CONTROL MEANS RESPONSIVE TO SAID SENSING MEANS AND MAINTAINING SAID AMBIENT TEMPERATURE AT A LEVEL OTHER THAN SAID PREDETERMINED LEVEL, SAID TEMPERATURE CONTROL MEANS CAUSING SAID AMBIENT TEMPERATURE TO CHANGE PAST SAID PREDETERMINED LEVEL WHEN SAID SENSING MEANS INDICATES A PREDETERMINED FROST ACCUMULATION CONDITION TO THEREBY ACTUATE SAID CONTROL MEANS.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |