Patent US2906831A successfully refreshed from Google Patents.
Patent US2000992A successfully refreshed from Google Patents.
US2000992A
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Separation of constituents of gaseous mixtures
Assignee: Airco Inc
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Filing: 1934-01-31
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Granted: 1935-05-14
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Expires: 1954-01-31
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Schlitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:38
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04284; F25J3/04309; F25J3/04315; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/0429; F25J3/04303; F25J3/04375; F25J3/04393; F25J3/04624; F25J3/0463; F25J3/04763; F25J3/04769; F25J3/04793; F25J2200/00; F25J2200/04; F25J2200/50; F25J2200/54; F25J2200/90; F25J2205/00; F25J2205/02; F25J2290/00; F25J2290/12
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) | 1938-05-13 | 1938-11-12 | 1939-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-13 | 1942-11-12 | 1943-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-13 | 1946-11-12 | 1947-05-14 | $7700.00 | Window Closed / Lapsed |