US3473342A
Expired / Lapsed
US
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Method and apparatus for liquefaction of neon
Assignee: NAUTCHNO IZSLEDOVATELSKI SEKTO
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Filing: 1967-04-03
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Granted: 1969-10-21
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Expires: 1987-04-03
Abstract
Abstract 1,186,432. Turbines. NAUTCHNO-IZSLEDOVATELSKI SEKTOR PRI PHISITCHESKIA FAKULTET NA SOFIISKI UNIVERSITET. April 3, 1967 [April 1, 1966], No. 6881/67. Heading F1T. [Also in Division F4] A turbo-expander suitable for cooling neon gas for providing refrigeration comprises a turbine rotor 70 mounted on a vertical shaft 62 having radial gas bearings 65 and a lower end thrust gas bearing 68 supplied with compressed neon at 54, 55 and having exhaust outlets 66, 67; the shaft also carrying an energy absorbing fan 69 supplied with neon through an inlet 52 and the compressed neon discharged at 53 is cooled in a nitrogen bath before being returned to the fan inlet.
Inventors
- 👤 Evgeni Iliev Leyarovski
- 👤 Zvetan Spassov Nanev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:52
CPC Classifications
F; F02; F02C; F02C1/00; F02C1/02; F01; F01D; F01D15/00; F01D15/005; F25; F25J; F25J1/00; F25J1/0002; F25J1/0005; F25J1/003; F25J1/0032; F25J1/0035; F25J1/0037; F25J1/004; F25J1/02; F25J1/0221; F25J1/0224; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0276; F25J2210/00; F25J2210/42; F25J2215/00; F25J2215/32; F25J2230/00; F25J2230/04; F25J2230/20; F25J2240/00; F25J2240/02; F25J2245/00; F25J2245/90; F25J2270/00; F25J2270/90; F25J2270/912; F25J2290/00; F25J2290/42
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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |