US3759825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a calcined copperiron supported catalyst and process utilizing the catalyst
Assignee: Gulf Research and Development Co
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Filing: 1971-07-15
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Granted: 1973-09-18
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Expires: 1991-07-15
Abstract
Abstract A COPPER-IRON GROUP METAL CATALYST USEFUL FOR THE CONVERSION OF THIOLS TO DISULFIDES IS PREPARED BY CO-IMPREGNATING A SUPPORT WITH A SOLUTION OF A COPPER SALT AND AN IRON GROUP METAL SALT BY THE METHOD OF MINIMUM EXCESS SOLUTION.
Inventors
- 👤 S Chun
- 👤 H Hamilton
- 👤 A Montagna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:52
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01J23/00; B01J23/70; B01J23/74; B01J23/745; C; C10; C10G; C10G27/00; C10G27/04; C10G27/08; B01J35/61; B01J35/615; B01J35/63; B01J35/635
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |