US3361682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina-based catalyst and method of preparing same
Assignee: Engelhard Industries Inc
•
Filing: 1965-06-11
•
Granted: 1968-01-02
•
Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 Carl D Keith
- 👤 Paula M Kenah
- 👤 Soustruznik George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:00
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J35/00; B01J35/60; B01J35/64; B01J35/651; B01J35/66; B01J37/00; B01J37/0009; B01J35/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3267025A
Cited
US3193348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |