US3745206A
Expired / Lapsed
US
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Removal and recovery of soluble platinum catalysts
Assignee: Dow Silicones Corp
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Filing: 1970-10-01
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Granted: 1973-07-10
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Expires: 1990-10-01
Abstract
Abstract PROCESSES ARE DISCLOSED FOR THE REMOVAL AND RECOVERY OF SOLUBLE PLATINUM CATALYST FROM LIQUIDS. THE PROCESSES COMPRISE THE STEPS OF (1) ADDING A SOLID CARRIER HAVING A THIOL OR THIOETHER FUNCTIONAL SILICONE ATTACHED TO ITS SURFACE TO THE LIQUID FROM WHICH THE SOLUBLE PLATINUM CATALYST IT TO BE REMOVED, (2) HEATING THE RESULTING MIXTURES WITH AGITATION, (3) SEPARATING THE SOLID CARRIER AND FORMERLY SOLUBLE PLATINUM CATALYST FROM THE LIQUID, AND (4) RECOVERING THE SOLUBLE PLATINUM CATALYST FROM THE SOLID CARRIER.
Inventors
- 👤 L Haluska
- 👤 J Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:50
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/32; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3257; B01J20/3259; B01D; B01D15/00; B01J38/00
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |