US2469314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for cracking hydrocarbons
Assignee: Shell Development Co
•
Filing: 1945-10-23
•
Granted: 1949-05-03
•
Expires: 1965-10-23
Abstract
No abstract record available.
Inventors
- 👤 Lloyd B Ryland
- 👤 Tamele Miroslav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:02
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1939647A
Cited
US2078945A
Cited
US2107710A
Cited
US2363231A
Cited
US2356576A
Cited
US2347231A
Cited
US2324518A
Cited
US2391482A
Cited
US2347216A
Cited
US2405408A
Cited
US2384942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |