Patent US4042519A successfully refreshed from Google Patents.
US3469271A
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Process and apparatus for low boiling gas mixtures
Assignee: Hitachi Ltd
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Filing: 1966-11-14
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Granted: 1969-09-30
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Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Kiyoshi Ichihara
- 👤 Junzo Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:46
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04763; F25J3/04769; F25J3/04812; F25J3/04818; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04303; F25J3/04406; F25J3/04412; F25J3/04854; F25J5/00; F25J2205/00; F25J2205/24; F25J2245/00; F25J2245/40; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2460859A
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US2513306A
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US2537046A
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US2861432A
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US2964914A
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US3143406A
Cited
US3127751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |