US3098845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of metal contaminants from polymers with chelating agents
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-11-23
•
Granted: 1963-07-23
•
Expires: 1975-11-23
Abstract
No abstract record available.
Inventors
- 👤 Cull Neville Leverne
- 👤 Aldridge Clyde Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:18
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
METHOD FOR REMOVING HEAVY METAL CONSTITUENTS IN CATALYST RESIDUES FROM SOLID POLYMERIZED ALPHA OLFINS SELECTED FROM THE GROUP CONSISTING OF EHTYLENE AND PROPYLENE PREPARED WITH A HEAVY METAL CATALYST FORMED BY ADMIXING AN ALUMINIUM ALKYL WITH COMPOUNDDS OF THE GROUP CONSISTING OF METALS OF THE GROUP IV-B, V-B, AND VI-B OF THE PERIODIC SYSTEM WHICH COMPRISES WASHING THE POLYMER IN THE SOLID, PLASTIC PHASE AT A TEMPERATURE BETWEEN 80 AND 250* F. AND IN THE ABSENCE OF WATER WITH A LIQUID ORGANIC SOLVENT CONTAINING 0.1 TO 50 WEIGHT PERCENT, BASED ON POLYMER, OF A DICARBONYL COMPOUND CHELATING AGENT HAVING THE FORMULA
Claim 2
Dependent Claim
101 words
METHOD FOR REMOVING HEAVY METAL CONSTITUENTS IN CATALYST RESIDUES FROM SOLID POLYMERIZED ALPHA OLFINS SELECTED FROM THE GROUP CONSISTING OF EHTYLENE AND PROPYLENE PREPARED WITH A HEAVY METAL CATALYST FORMED BY ADMIXING AN ALUMINIUM ALKYL WITH COMPOUNDDS OF THE GROUP CONSISTING OF METALS OF THE GROUP IV-B, V-B, AND VI-B OF THE PERIODIC SYSTEM WHICH COMPRISES WASHING THE POLYMER IN THE SOLID, PLASTIC PHASE AT A TEMPERATURE BETWEEN 80 AND 250* F. AND IN THE ABSENCE OF WATER WITH A LIQUID ORGANIC SOLVENT CONTAINING 0.1 TO 50 WEIGHT PERCENT, BASED ON POLYMER, OF A DICARBONYL COMPOUND CHELATING AGENT HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |