Patent US2731398A successfully refreshed from Google Patents.
US2731398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion of hydrocarbons with the stripping of the fouled catalyst particles
Assignee: MW Kellogg Co
•
Filing: 1951-05-24
•
Granted: 1956-01-17
•
Expires: 1971-05-24
Abstract
No abstract record available.
Inventors
- 👤 Belchetz Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:44
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1845; B01J8/1863
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1577534A
Cited
US1863803A
Cited
US1836301A
Cited
US2079158A
Cited
US2231424A
Cited
US2305569A
Cited
US2403375A
Cited
US2273075A
Cited
US2302209A
Cited
US2353495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |