US3303020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the removal of a platinum group metal from an organic reaction product
Assignee: Gulf Research and Development Co
•
Filing: 1963-10-21
•
Granted: 1967-02-07
•
Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 William H Clement
- 👤 Charles M Selwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:39
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR THE RECOVERY OF A PLATINUM GROUP METAL SUBSTANTIALLY COMPLETELY FROM A NORMALLY LIQUID ORGANIC REACTION PRODUCT COMPRISING A SOLUBLE PLATINUM GROUP METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFATES, PHOSPHATES AND HALIDES WHICH ARE PARTIALLY EXTRACTABLE FROM THE REACTION PRODUCT WITH AN AQUEOUS MIRERAL ACID WHICH COMPRISES CONTACTING SAID ORGANIC REACTION PRODUCT WITH A SOLID INERT MATERIAL AT A TEMPERATURE OF AT LEAST 125*C. BUT LESS THAN THE DECOMPOSITION TEMPERATURE OF SAID REACTION PRODUCT FOR A TIME SUFFICIENT TO PRECIPITATE THE PLATINUM GROUP METAL AS THE FREE METAL WHILE MAINTAINING SAID REACTION PRODUCT IN THE LIQUID PHASE.
Claim 2
Dependent Claim
101 words
A PROCESS FOR THE RECOVERY OF A PLATINUM GROUP METAL SUBSTANTIALLY COMPLETELY FROM A NORMALLY LIQUID ORGANIC REACTION PRODUCT COMPRISING A SOLUBLE PLATINUM GROUP METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFATES, PHOSPHATES AND HALIDES WHICH ARE PARTIALLY EXTRACTABLE FROM THE REACTION PRODUCT WITH AN AQUEOUS MIRERAL ACID WHICH COMPRISES CONTACTING SAID ORGANIC REACTION PRODUCT WITH A SOLID INERT MATERIAL AT A TEMPERATURE OF AT LEAST 125*C. BUT LESS THAN THE DECOMPOSITION TEMPERATURE OF SAID REACTION PRODUCT FOR A TIME SUFFICIENT TO PRECIPITATE THE PLATINUM GROUP METAL AS THE FREE METAL WHILE MAINTAINING SAID REACTION PRODUCT IN THE LIQUID PHASE.
References Cited (Backward Citations)
US1848723A
Cited
US2747986A
Cited
US2721136A
Cited
US3016354A
Cited
US2828200A
Cited
US3154586A
Cited
US3122586A
Cited
US3119875A
Cited
US3129253A
Cited
US3210152A
Cited
US3188299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |