Patent US3271324A successfully refreshed from Google Patents.
US3271324A
Expired / Lapsed
US
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Catalyst composition consisting of copper oxide-iron oxide on alumina
Assignee: Ethyl Corp
•
Filing: 1962-06-01
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Granted: 1966-09-06
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Expires: 1982-06-01
Abstract
No abstract record available.
Inventors
- 👤 Ruth E Stephens
- 👤 Jr Daniel A Hirschler
- 👤 Frances W Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:20
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J; B01J23/00; B01J23/70; B01J37/00; B01J37/02; B01J37/0201
Claims Analysis
Total Claims: 0
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |