US2195987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of krypton and xenon from the atmosphere
Assignee: Airco Inc
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Filing: 1937-03-27
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Granted: 1940-04-02
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Expires: 1957-03-27
Abstract
No abstract record available.
Inventors
- 👤 Gomonet Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:18
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04642; F25J3/04745; C; C01; C01B; C01B23/00; F25J3/04248; F25J3/04333; F25J3/04351; F25J3/04624; F25J2200/00; F25J2200/02; F25J2200/04; 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) | 1943-04-02 | 1943-10-02 | 1944-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-02 | 1947-10-02 | 1948-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-02 | 1951-10-02 | 1952-04-02 | $7700.00 | Window Closed / Lapsed |