Patent US2406646A successfully refreshed from Google Patents.
US2406646A
Expired / Lapsed
US
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Manufacture of catalysts
Assignee: Universal Oil Products Co
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Filing: 1942-07-20
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Granted: 1946-08-27
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Expires: 1962-07-20
Abstract
No abstract record available.
Inventors
- 👤 Glenn M Webb
- 👤 Marvin A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:36
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; B01J23/20; B01J23/22; B01J37/00; B01J37/02; B01J37/0236; B01J37/0009; B01J37/0018; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
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) | 1949-08-26 | 1950-02-25 | 1950-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-08-26 | 1954-02-25 | 1954-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-08-26 | 1958-02-25 | 1958-08-27 | $7700.00 | Window Closed / Lapsed |