Patent US3850402A successfully refreshed from Google Patents.
Patent US2408164A successfully refreshed from Google Patents.
US2408164A
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Catalyst preparation
Assignee: Phillips Petroleum Co
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Filing: 1942-04-25
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Granted: 1946-09-24
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Expires: 1962-04-25
Abstract
No abstract record available.
Inventors
- 👤 Arch L Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/30; B01J27/00; B01J27/06; B01J27/08; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30223; B01J2219/30226; B01J2219/30238; B01J2219/30242; B01J2219/30296; B01J2219/304; B01J2219/30475; B01J35/00; B01J35/50; B01J35/55; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-09-23 | 1950-03-25 | 1950-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-23 | 1954-03-25 | 1954-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-23 | 1958-03-25 | 1958-09-24 | $7700.00 | Window Closed / Lapsed |