Patent US3520143A successfully refreshed from Google Patents.
US3520143A
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Process for the separation of mixtures with components having widely spaced boiling points by refraction,partial condensation in a regenerator and recycle of high boiling material
Assignee: Linde GmbH
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Filing: 1966-07-27
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Granted: 1970-07-14
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Expires: 1986-07-27
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:40
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0238; F25J3/0204; F25J3/0219; F25J3/0233; F25J3/0242; F25J2200/00; F25J2200/70; F25J2200/74; F25J2200/80; F25J2205/00; F25J2205/24; F25J2205/40; F25J2205/50; F25J2205/60; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/62; F25J2230/00; F25J2230/08; F25J2270/00; F25J2270/02; F25J2270/04; F25J2270/60; F25J2270/88
Claims Analysis
Total Claims: 0
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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 |