US3564863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system purifier
Assignee: Refrigeration System Purifiers
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Filing: 1968-05-14
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Granted: 1971-02-23
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Expires: 1988-05-14
Abstract
Abstract A PORTABLE FLUID PURIFIER FOR TEMPORARY CONNECTION TO A REFRIGERATION SYSTEM, PRIMARILY THE COMPRESSOR, IS PROVIDED WITH A SEQUENCE OF FILTERING MEDIA CONTAINED IN ONE OR MORE FILTER ELEMENTS. THE MEDIA ARE SEPARATED BY FLOW FACILITATING SCREENS AND THE FILTER ELEMENT ARE PROVIDED WITH FLOW FACILITATING CHANNELS AND A TIGHT BUT READILY RELEASABLE SEAL.
Inventors
- 👤 Brady R Sasselli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:49
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/02; F25B43/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |