US3520149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating and removing oil contained in circulating refrigerant
Assignee: Individual
•
Filing: 1968-10-29
•
Granted: 1970-07-14
•
Expires: 1988-10-29
Abstract
No abstract record available.
Inventors
- 👤 Eiichi Uratani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:33
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/02; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/0217; B01D17/04
Claims Analysis
Total Claims: 0
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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) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |