US2620967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas ejector apparatus for a catalyst regenerator
Assignee: Lummus Technology LLC
•
Filing: 1948-07-08
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Granted: 1952-12-09
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Expires: 1968-07-08
Abstract
No abstract record available.
Inventors
- 👤 George A Worn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:29
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; B01J8/1827; F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/467
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) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |