Patent UST105201I4 successfully refreshed from Google Patents.
Patent US3492828A successfully refreshed from Google Patents.
US3492828A
Expired / Lapsed
US
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Process and apparatus for heat exchange of streams in the low temperature separation of gas mixtures
Assignee: Linde GmbH
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Filing: 1966-07-19
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Granted: 1970-02-03
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Expires: 1986-07-19
Abstract
No abstract record available.
Inventors
- 👤 Gunther Ruckborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:10
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0062; F28D9/0068; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04006; F25J3/04012; F25J3/04018; F25J3/04024; F25J3/04109; F25J3/04115; F25J3/04127; F25J3/04248; F25J3/04333; F25J3/04339; F25J3/04345; F25J3/04351; F25J3/04357; F25J3/044; F25J3/04521; F25J3/04593; F25J3/046; F25J5/00; F25J5/002; F25J2200/00; F25J2200/70; F25J2200/74; F25J2200/76; F25J2200/90; F25J2290/00; F25J2290/32; F25J2290/42; F28D21/00; F28D2021/0019; F28D2021/0033; Y; Y10; Y10S; Y10S62/00; Y10S62/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2534478A
Cited
US2863296A
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US3062016A
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US3144316A
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US3188823A
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US3348384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |