US3008938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydrocarbon polymers
Assignee: Phillips Petroleum Co
•
Filing: 1956-07-09
•
Granted: 1961-11-14
•
Expires: 1976-07-09
Abstract
No abstract record available.
Inventors
- 👤 Howard B Irvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:26
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS FOR POLYMERIZING A 1-OLEFIN TO PRODUCE A NORMALLY SOLID POLYMER WHICH COMPRISES INTRODUCING SAID 1-OLEFIN TANGENTIALLY INTO A REACTION ZONE INTO A BODY OF AN INERT LIQUID HYDROCARBON SOLVENT WHICH HAS LIMITED SOLUBILITY FOR THE POLYMER UNDER THE CONDITIONS OF POLYMERIZATION CONTAINING A FINELY DIVIDED SOLID CATALYST SUSPENDED THEREIN, SO AS TO FORM A VORTEX IN SAID INERT LIQUID SOLVENT, MAINTAINING A TEMPERATURE AT WHICH THE POLYMER IS ONLY PARTIALLY SOLUBLE IN THE SOLVENT, AND REMOVING FROM A POINT BELOW THE POINT OF INTRODUCTION OF 1-OLEFIN POLYMER WHICH HAS BEEN THROWN OUT OF SOLUTION FROM THE REACTION MIXTURE BY VIRTUE OF THE CENTRIFUGAL FORCE CREATED BY THE VORTEX.
Claim 2
Dependent Claim
110 words
THE PROCESS FOR POLYMERIZING A 1-OLEFIN TO PRODUCE A NORMALLY SOLID POLYMER WHICH COMPRISES INTRODUCING SAID 1-OLEFIN TANGENTIALLY INTO A REACTION ZONE INTO A BODY OF AN INERT LIQUID HYDROCARBON SOLVENT WHICH HAS LIMITED SOLUBILITY FOR THE POLYMER UNDER THE CONDITIONS OF POLYMERIZATION CONTAINING A FINELY DIVIDED SOLID CATALYST SUSPENDED THEREIN, SO AS TO FORM A VORTEX IN SAID INERT LIQUID SOLVENT, MAINTAINING A TEMPERATURE AT WHICH THE POLYMER IS ONLY PARTIALLY SOLUBLE IN THE SOLVENT, AND REMOVING FROM A POINT BELOW THE POINT OF INTRODUCTION OF 1-OLEFIN POLYMER WHICH HAS BEEN THROWN OUT OF SOLUTION FROM THE REACTION MIXTURE BY VIRTUE OF THE CENTRIFUGAL FORCE CREATED BY THE VORTEX.
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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) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |