US3062795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing halogenated copolymers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1958-04-01
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Granted: 1962-11-06
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Expires: 1978-04-01
Abstract
No abstract record available.
Inventors
- 👤 William P Cain
- 👤 Henry S Makowski
- 👤 Attilio L Bisio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025; C08F; C08F210/00; C08F8/00; C08F8/18; C08F8/20; C08K3/00; C08K3/01; C08K3/011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR PREPARING A HALOGENATED COPOLYMER OF ETHYLENE AND PROPYLENE WHICH COMPRISES: (1) POLYMERIZING SAID ETHYLENE AND PROPYLENE IN AN INERT DILUENT AT A TEMPERATURE BETWEEN 0 AND 110*C. IN THE PRESENCE OF A LOW PRESSURE POLYMERIZATION CATALYST COMPRISING A PARTIALLY REDUCED HEAVY TRANSITION METAL COMPOUND ACTIVATED WITH AN ALKYL ALUMINUM COMPOUND TO FORM A POLYMERIZATION REACTION MIXTURE; (2) INACTIVATING SAID CATALYST IN SAID POLYMERIZATION REACTION MIXTURE; AND (3) TREATING SAID REACTION MIXTURE AT A TEMPERATURE BETWEEN 0 AND 150*C. WITH A HALOGENATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLORINATING AGENTS AND BROMINATING AGENTS TO PRODUCE A HALOGENATED COPOLYMER.
Claim 2
Dependent Claim
101 words
A PROCESS FOR PREPARING A HALOGENATED COPOLYMER OF ETHYLENE AND PROPYLENE WHICH COMPRISES: (1) POLYMERIZING SAID ETHYLENE AND PROPYLENE IN AN INERT DILUENT AT A TEMPERATURE BETWEEN 0 AND 110*C. IN THE PRESENCE OF A LOW PRESSURE POLYMERIZATION CATALYST COMPRISING A PARTIALLY REDUCED HEAVY TRANSITION METAL COMPOUND ACTIVATED WITH AN ALKYL ALUMINUM COMPOUND TO FORM A POLYMERIZATION REACTION MIXTURE; (2) INACTIVATING SAID CATALYST IN SAID POLYMERIZATION REACTION MIXTURE; AND (3) TREATING SAID REACTION MIXTURE AT A TEMPERATURE BETWEEN 0 AND 150*C. WITH A HALOGENATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLORINATING AGENTS AND BROMINATING AGENTS TO PRODUCE A HALOGENATED COPOLYMER.
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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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |