Patent US4725784A successfully refreshed from Google Patents.
US2453084A
Expired / Lapsed
US
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Manufacture of bead-form catalyst
Assignee: ExxonMobil Oil Corp
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Filing: 1946-05-24
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Granted: 1948-11-02
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Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 Brown Henry Trueheart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:38
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/06; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319771A
Cited
US2371237A
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US1281371A
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US2203825A
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US2371087A
Cited
US2387596A
Cited
US2384946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |