Patent US2040112A successfully refreshed from Google Patents.
US2040112A
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Method for the separation and recovery of krypton and xenon from gaseous mixtures containing them
Assignee: Airco Inc
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Filing: 1935-04-05
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Granted: 1936-05-12
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Expires: 1955-04-05
Abstract
No abstract record available.
Inventors
- 👤 Claude C Van Nuys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:01
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04642; F25J3/04745; F25J3/04248; F25J3/04333; F25J3/04363; F25J3/044; F25J2200/00; F25J2200/30; F25J2200/40; F25J2200/70; F25J2200/76; F25J2230/00; F25J2230/50; F25J2250/00; F25J2250/20; Y; Y10; Y10S; Y10S62/00; Y10S62/923; Y10S62/925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-05-12 | 1939-11-11 | 1940-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-12 | 1943-11-11 | 1944-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-12 | 1947-11-11 | 1948-05-12 | $7700.00 | Window Closed / Lapsed |