US3374212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of polymerized olefins prepared with catalysts containing vanadium compounds
Assignee: Dow Chemical Co
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Filing: 1965-07-12
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Granted: 1968-03-19
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Expires: 1985-07-12
Abstract
No abstract record available.
Inventors
- 👤 Michael J Marinak
- 👤 George S Fujioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:02
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR REMOVING COLORED VANADIUM CONSTITUENTS IN CATALYST RESIDUES CONTAINED IN A POLYMER OF AN OLEFINIC COMPOUND POLYMERIZED WITH A CATALYST FORMED BY ADMIXING AN ORGANO-METALLIC REDUCING COMPOUND WITH A REDUCIBLE VANADIUM COMPOUND, WHICH PROCESS COMPRISES FIRST TREATING THE POLYMER CONTAINING SAID CATALYST RESIDUES WITH A SOLUTION OF AN OXIDIZING AGENT AT A PH BELOW 9 IN AN AMOUNT SUFFICIENT TO OXIDIZE THE VANADIUM CONSTITUENT TO THE VANADIUM V STATE AND THEN CONVERTING THE OXIDIZED VANADIUM CONSTITUENT TO THE VANADATE SALT FORM WITH A SOLUTION OF AN ALKALINE COMPOUND AT A PH BETWEEN ABOUT 9 TO ABOUT 14.
Claim 2
Dependent Claim
99 words
A PROCESS FOR REMOVING COLORED VANADIUM CONSTITUENTS IN CATALYST RESIDUES CONTAINED IN A POLYMER OF AN OLEFINIC COMPOUND POLYMERIZED WITH A CATALYST FORMED BY ADMIXING AN ORGANO-METALLIC REDUCING COMPOUND WITH A REDUCIBLE VANADIUM COMPOUND, WHICH PROCESS COMPRISES FIRST TREATING THE POLYMER CONTAINING SAID CATALYST RESIDUES WITH A SOLUTION OF AN OXIDIZING AGENT AT A PH BELOW 9 IN AN AMOUNT SUFFICIENT TO OXIDIZE THE VANADIUM CONSTITUENT TO THE VANADIUM V STATE AND THEN CONVERTING THE OXIDIZED VANADIUM CONSTITUENT TO THE VANADATE SALT FORM WITH A SOLUTION OF AN ALKALINE COMPOUND AT A PH BETWEEN ABOUT 9 TO ABOUT 14.
References Cited (Backward Citations)
US3112299A
Cited
US3114742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |