US3232913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerization of olefins
Assignee: Solvay SA
•
Filing: 1962-12-03
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Granted: 1966-02-01
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Robert Van Weynbergh
- 👤 Schmitz Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:48
CPC Classifications
C; C07; C07F; C07F5/00; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
IN A PROCESS FOR THE POLYMERIZATION OF OLEFINS TO SOLID POLYMERS IN THE PRESENCE OF A SUPPORTED CHROMIUM OXIDE CATALYST WHEREIN AT LEAST PART OF THE CHROMIUM IS HEXAVALENT AT THE INITIAL CONTACTING OF SAID OLEFIN WITH SAID CATALYST, THE IMPROVEMENT WHICH COMPRISES INTRODUCING INTO THE REACTION, AS COCATALYST HAVING THE FORMULA:
Claim 2
Dependent Claim
52 words
IN A PROCESS FOR THE POLYMERIZATION OF OLEFINS TO SOLID POLYMERS IN THE PRESENCE OF A SUPPORTED CHROMIUM OXIDE CATALYST WHEREIN AT LEAST PART OF THE CHROMIUM IS HEXAVALENT AT THE INITIAL CONTACTING OF SAID OLEFIN WITH SAID CATALYST, THE IMPROVEMENT WHICH COMPRISES INTRODUCING INTO THE REACTION, AS COCATALYST 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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |