US3057168A
Expired / Lapsed
US
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Rectification of liquid mixtures boiling at low temperatures
Assignee: Linde GmbH
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Filing: 1957-09-16
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Granted: 1962-10-09
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Becker Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:04
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0252; F25J3/0204; F25J3/0219; F25J3/0238; F25J3/04; F25J3/04248; F25J3/04333; F25J3/04351; F25J3/04363; F25J3/04436; F25J3/04454; F25J2200/00; F25J2200/08; F25J2200/50; F25J2200/54; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/62; F25J2250/00; F25J2250/20
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) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |