US2881595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of gaseous mixtures
Assignee: Air Products Inc
•
Filing: 1953-10-28
•
Granted: 1959-04-14
•
Expires: 1973-10-28
Abstract
No abstract record available.
Inventors
- 👤 Jay V Fetterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:55
CPC Classifications
F; F25; F25J; F25J5/00; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2113680A
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US2039889A
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GB454141A
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US2209748A
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US2423543A
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US2503939A
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US2552560A
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US2496380A
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US2504051A
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US2584381A
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DE803301C
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US2671318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |