US3410792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing particulate catalyst from fluid-catalyst contacting zone
Assignee: Cities Service Research and Development Co
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Filing: 1965-10-22
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Granted: 1968-11-12
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Roger P Van Driesen
- 👤 Norman C Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:48
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/14; C10G45/16; B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0035; C10G47/00; C10G47/24; C10G47/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |