US3760596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of liberation of pure nitrogen and oxygen from air
Assignee: Individual
•
Filing: 1971-11-03
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Granted: 1973-09-25
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Expires: 1991-11-03
Abstract
Abstract A METHOD OF LIBERATION OF PURE NITROGEN AND OXYGEN FROM AIR BY WAY OF LIQUEFACTION OF SAID AIR ON THE CYCLE OF AVERAGE OR HIGH PRESSURE AND SUBSEQUENT FRACTIONATION, ACCORDING TO WHICH METHOD AIR IS DIVIDED PRIOR TO FRACTIONATION INTO TWO FLOWS, OF WHICH ONE COOLED BY HEAT EXCHANGE WITH THE NITROGEN FRACTIONATION PRODUCT, WHILE THE OTHER FLOW IS COOLED BY COMPRESSED OXYGEN AND AN ARGON FRACTION WHICH ARE LIKEWISE FRACTIONATION PRODUCTS. D R A W I N G
Inventors
- 👤 G Basin
- 👤 I Gorenshtein
- 👤 A Myasoed
- 👤 Y Zanis
- 👤 M Lemberg
- 👤 S Linetsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:45
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/04006; F25J3/04078; F25J3/0409; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/04406; F25J3/04412; F25J3/04642; F25J3/04648; F25J5/00; F25J5/002; F25J2215/00; F25J2215/58; F25J2240/00; F25J2240/40; F25J2240/42
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |