Patent US2146197A successfully refreshed from Google Patents.
US2146197A
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Method of and apparatus for separating mixed gases and vapors
Assignee: Individual
•
Filing: 1936-03-14
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Granted: 1939-02-07
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Expires: 1956-03-14
Abstract
No abstract record available.
Inventors
- 👤 Lee S Twomey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:59
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04436; F25J3/04454; F25J3/04248; F25J3/04254; F25J3/04278; F25J2200/00; F25J2200/50; F25J2200/54; F25J2210/00; F25J2210/42; F25J2270/00; F25J2270/42
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) | 1942-02-06 | 1942-08-08 | 1943-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-06 | 1946-08-08 | 1947-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-06 | 1950-08-08 | 1951-02-07 | $7700.00 | Window Closed / Lapsed |