US3446785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of olefins
Assignee: Dow Chemical Co
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Filing: 1964-12-09
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Granted: 1969-05-27
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Expires: 1984-12-09
Abstract
No abstract record available.
Inventors
- 👤 Owen L Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:47
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PREPARATION OF SYNTHETIC POLYMERS WHICH COMPRISES SUBJECTING TO POLYMERIZATION CONJUGATED DIOLEFINS HAVING 5 TO 12 CARBON ATOMS IN THE PRESENCE OF A CATALYST CONSISTING OF A MONOALKYLALUMINUM DIHALIDE AND RECOVERING THE POLYMER SO PRODUCED.
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE PREPARATION OF SYNTHETIC POLYMERS WHICH COMPRISES SUBJECTING TO POLYMERIZATION CONJUGATED DIOLEFINS HAVING 5 TO 12 CARBON ATOMS IN THE PRESENCE OF A CATALYST CONSISTING OF A MONOALKYLALUMINUM DIHALIDE AND RECOVERING THE POLYMER SO PRODUCED.
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) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |