Patent US2940270A successfully refreshed from Google Patents.
US2940270A
Expired / Lapsed
US
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Gas separation
Assignee: MW Kellogg Co
•
Filing: 1956-07-02
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Granted: 1960-06-14
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Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Dominic F Palazzo
- 👤 Warren C Schreiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:43
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0252; F25J3/0204; F25J3/0219; F25J3/0233; F25J2205/00; F25J2205/50; F25J2210/00; F25J2210/12; F25J2270/00; F25J2270/04
Claims Analysis
Total Claims: 0
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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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |