US3224962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfide treatment of reforming catalyst
Assignee: Shell USA Inc
•
Filing: 1962-07-27
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Granted: 1965-12-21
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Expires: 1982-07-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Douglas Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:44
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J21/00; B01J21/02; B01J21/04; B01J23/42; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; B01J37/00; B01J37/20
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |