US3215683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of polyolefins
Assignee: Hercules Powder Co
•
Filing: 1956-11-01
•
Granted: 1965-11-02
•
Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Bert H Mahlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:31
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN THE PROCESS OF POLYMERIZING AN EHTYLENICALLY UNSATURATED HYDROCARBON IN AN INERT LIQUID ORGANIC DILUENT WITH A CATALYST COMPRISING A COMPOUND OF A METAL SELECTED FROM THE GROP CONSISTING OF THE METALS OF GROUPS IV-B, V-B, VI-B AND VIII OF THE PERIODIC TABLE AND MANGANESE AND AN ORGANOMETALLIC COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ALKALINE EARTH METALS, AND EARTH METALS, THE STEP OF REMOVING THE CATALYST RESIDUES FROM THE POLYMER WHICH COMPRISES ADDING TO THE POLYMERIZATION REACTION MIXTURE CONTAINING THE POLYMER A PRIMARY ALCOHOL CONTAINING FROM 4 TO 9 CARBON ATOMS SEPARATING THE SOLID POLYMER FROM THE LIQUID PHASE, AND THEN WASHING THE SOLID POLYMER WITH A LIQUID HYDROCARBON.
Claim 2
Dependent Claim
115 words
IN THE PROCESS OF POLYMERIZING AN EHTYLENICALLY UNSATURATED HYDROCARBON IN AN INERT LIQUID ORGANIC DILUENT WITH A CATALYST COMPRISING A COMPOUND OF A METAL SELECTED FROM THE GROP CONSISTING OF THE METALS OF GROUPS IV-B, V-B, VI-B AND VIII OF THE PERIODIC TABLE AND MANGANESE AND AN ORGANOMETALLIC COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ALKALINE EARTH METALS, AND EARTH METALS, THE STEP OF REMOVING THE CATALYST RESIDUES FROM THE POLYMER WHICH COMPRISES ADDING TO THE POLYMERIZATION REACTION MIXTURE CONTAINING THE POLYMER A PRIMARY ALCOHOL CONTAINING FROM 4 TO 9 CARBON ATOMS SEPARATING THE SOLID POLYMER FROM THE LIQUID PHASE, AND THEN WASHING THE SOLID POLYMER WITH A LIQUID HYDROCARBON.
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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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |