Patent US2763138A successfully refreshed from Google Patents.
US2763138A
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Process and apparatus for separating gases
Assignee: American Messer Corp
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Filing: 1954-02-16
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Granted: 1956-09-18
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Expires: 1974-02-16
Abstract
No abstract record available.
Inventors
- 👤 Tsunoda Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:58
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04151; F25J3/04187; F25J3/04193; F25J3/04248; F25J3/04278; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/04406; F25J3/04412; F25J2200/00; F25J2200/50; F25J2200/52; F25J2205/00; F25J2205/24; F25J2240/00; F25J2240/40; F25J2240/42; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |