US2409459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of the constituents of air
Assignee: Airco Inc
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Filing: 1944-06-16
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Granted: 1946-10-15
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Expires: 1964-06-16
Abstract
No abstract record available.
Inventors
- 👤 Claude C Van Nuys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:46
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/04224; F25J3/04248; F25J3/04333; F25J3/04351; F25J3/04357; F25J3/04624; F25J3/04763; F25J3/04866; F25J3/04872; F25J3/04884; F25J2200/00; F25J2200/04; F25J2250/00; F25J2250/30; F25J2250/42
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) | 1949-10-14 | 1950-04-15 | 1950-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-14 | 1954-04-15 | 1954-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-14 | 1958-04-15 | 1958-10-15 | $7700.00 | Window Closed / Lapsed |