US3276212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for rectification of an olefin by utilization of refrigeration supplied byliquefied methane
Assignee: Hitachi Ltd
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Filing: 1964-02-24
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Granted: 1966-10-04
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Expires: 1984-02-24
Abstract
No abstract record available.
Inventors
- 👤 Ichihara Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:02
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0238; C; C07; C07C; C07C7/00; C07C7/04; F17; F17C; F17C9/00; F17C9/02; F17C9/04; F25J3/0204; F25J3/0219; F25J3/0233; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2227/00; F17C2227/01; F17C2227/0128; F17C2227/0157; F25J2200/00; F25J2200/80; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/12; F25J2210/62; F25J2215/00; F25J2215/62; F25J2270/00; F25J2270/90; F25J2270/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1233881A
Cited
US3213631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |