Patent US3021689A successfully refreshed from Google Patents.
US3021689A
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US
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Oil separator for refrigeration system
Assignee: Individual
•
Filing: 1959-07-07
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Granted: 1962-02-20
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Expires: 1979-07-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:55
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/02; F25B2339/00; F25B2339/04; F25B2339/047; F25B40/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US323749A
Cited
US1246849A
Cited
US2155051A
Cited
US2149358A
Cited
US2453823A
Cited
US2618132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |