US3107843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensating thermostatic control system for compressors
Assignee: Electro Therm Inc
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Filing: 1961-01-23
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Granted: 1963-10-22
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 John J Finn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:37
CPC Classifications
F; F25; F25B; F25B31/00; F25B49/00; F25B49/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
IN COMBINATION, AN ELECTRICALLLY DRIVEN COMPRESSOR OF THE TYPE EMPLOYING OIL LUBRICANT, HEATING MEANS MOUNTED IN THE COMPRESSOR IN A POSITION TO HEAT THE LUBRICANT IN THE COMPRESSOR, TEMPERATURE-SENSITIVE MEANS IN THERMAL CONTACT WITH THE OIL LUBRICANT AND OPERATING TO ENERGIZE SAID COMPRESSOR RESPONSIVE TO A PREDETERMINED RISE IN TEMPERATURE IN THE OIL LUBRICANT, AND ADDITIONAL TEMPERATURE-SENSITIVE MEANS EXPOSED TO AMBIENT TEMPERATURE ADJACENT SAID COMPRESSOR AND OPERATING RESPONSIVE TO LOW AMBIENT TEMPERATURE ADJACENT SAID COMPRESSOR TO ENERGIZE SAID COMPRESSOR PRIOR TO SAID PREDETERMINED RISE IN TEMPERATURE.
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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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |