Patent US3427819A successfully refreshed from Google Patents.
US3427819A
Expired / Lapsed
US
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High side defrost and head pressure controls for refrigeration systems
Assignee: Pet Inc
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Filing: 1966-12-22
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Granted: 1969-02-18
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Expires: 1986-12-22
Abstract
No abstract record available.
Inventors
- 👤 Leland L Seghetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:24
CPC Classifications
F; F25; F25B; F25B40/00; F25B40/02; F25B47/00; F25B47/02; F25B47/022; F25B49/00; F25B49/02; F25B5/00; F25B5/02; F25B2400/00; F25B2400/13; F25B2400/16; F25B2400/22; F25B2400/23; F25B41/00; F25B41/20; F25B41/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2934911A
Cited
US3133426A
Cited
US3195319A
Cited
US3248895A
Cited
US3343375A
Cited
US3358469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |