US2976270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuously metering catalyst into a polymerization system
Assignee: Dow Chemical Co
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Filing: 1956-03-16
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Granted: 1961-03-21
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Expires: 1976-03-16
Abstract
No abstract record available.
Inventors
- 👤 Malin Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:13
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR THE CONTINUOUS INTRODUCTION TO AN ADDITION POLYMERIZATION SYSTEM OF AN OIL-SOLUBLE FREE RADICAL POLYMERIZATION CATALYST TO MAINTAIN THE DESIRED CONCENTRATION THEREOF IN THE SYSTEM, COMPRISING METERING LIQUID UNCATALYZED MONOMER INTO A ZONE CONTAINING AN AMOUNT OF SAID OIL-SOLUBLE FREE RADICAL POLYMERIZATION CATALYST IN EXCESS OF THAT CAPABLE OF DISSOLUTION AT A TEMPERATURE AT WHICH ONLY ENOUGH CATALYST WILL DISSOLVE IN THE MONOMER TO PRODUCE A SATURATED SOLUTION THEREOF AT A CONCENTRATION DESIRED FOR SUBSEQUENT POLYMERIZATION, THE METERING OF SAID UNCATALYZED MONOMER INTO SAID ZONE BEING AT THE DESIRED RATE OF FEED TO A SUBSEQUENT POLYMERIZATION, AND WITHDRAWING SAID SATURATED SOLUTION OF CATALYST IN MONOMER FROM SAID ZONE AND PASSING THE SOLUTION INTO A POLYMERIZATION ZONE.
Claim 2
Dependent Claim
118 words
A PROCESS FOR THE CONTINUOUS INTRODUCTION TO AN ADDITION POLYMERIZATION SYSTEM OF AN OIL-SOLUBLE FREE RADICAL POLYMERIZATION CATALYST TO MAINTAIN THE DESIRED CONCENTRATION THEREOF IN THE SYSTEM, COMPRISING METERING LIQUID UNCATALYZED MONOMER INTO A ZONE CONTAINING AN AMOUNT OF SAID OIL-SOLUBLE FREE RADICAL POLYMERIZATION CATALYST IN EXCESS OF THAT CAPABLE OF DISSOLUTION AT A TEMPERATURE AT WHICH ONLY ENOUGH CATALYST WILL DISSOLVE IN THE MONOMER TO PRODUCE A SATURATED SOLUTION THEREOF AT A CONCENTRATION DESIRED FOR SUBSEQUENT POLYMERIZATION, THE METERING OF SAID UNCATALYZED MONOMER INTO SAID ZONE BEING AT THE DESIRED RATE OF FEED TO A SUBSEQUENT POLYMERIZATION, AND WITHDRAWING SAID SATURATED SOLUTION OF CATALYST IN MONOMER FROM SAID ZONE AND PASSING THE SOLUTION INTO A POLYMERIZATION ZONE.
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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |