US2667044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of separating gases
Assignee: Joy Manufacturing Co
•
Filing: 1951-02-09
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Granted: 1954-01-26
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Expires: 1971-02-09
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:25
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04763; F25J3/04866; F25J3/04872; F25J3/04878; F25J3/04006; F25J3/04012; F25J3/04018; F25J3/0403; F25J3/04109; F25J3/04145; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/04224; F25J3/0423; F25J3/04248; F25J3/04333; F25J3/04351; F25J3/04357; F25J3/04375; F25J3/04393; F25J3/04406; F25J3/04412; F25J2205/00; F25J2205/24; F25J2235/00; F25J2235/50; F25J2235/52
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |