Patent US2809169A successfully refreshed from Google Patents.
US2809169A
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US
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Processes for the manufacture of catalysts
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1951-10-06
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Granted: 1957-10-08
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Expires: 1971-10-06
Abstract
No abstract record available.
Inventors
- 👤 Robert S Whiteley
- 👤 Jr Charles N Kimberlin
- 👤 Jr Robert E Schexnailder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:09
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J13/00; B01J21/12; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2435158A
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US2467470A
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US2471000A
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US2579251A
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US2595339A
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US2582254A
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US2713037A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |