Patent US2211208A successfully refreshed from Google Patents.
US2211208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of catalysts
Assignee: Universal Oil Products Co
•
Filing: 1938-10-31
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Granted: 1940-08-13
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Expires: 1958-10-31
Abstract
No abstract record available.
Inventors
- 👤 Vladimir N Ipatieff
- 👤 Ben B Corson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:12
CPC Classifications
B; B01; B01J; B01J37/00; B01J23/00; B01J23/70; B01J37/0009; B01J37/02; B01J37/0201; 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) | 1943-08-13 | 1944-02-12 | 1944-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-13 | 1948-02-12 | 1948-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-13 | 1952-02-12 | 1952-08-13 | $7700.00 | Window Closed / Lapsed |