Patent US3008920A successfully refreshed from Google Patents.
US3008920A
Expired / Lapsed
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Method of inhibiting homopolymerization in graft copolymers with copper salts
Assignee: Dow Chemical Co
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Filing: 1959-04-27
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Granted: 1961-11-14
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Expires: 1979-04-27
Abstract
No abstract record available.
Inventors
- 👤 Urchick Demetrius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:54
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/18; C08F291/185; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR MAKING A GRAFT COPOLYMER WHICH COMPRISES POLYMERIZING A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER IN THE PRESENCE OF AN ORGANIC POLYMER CONTAINING AT LEAST 20 MONOMER UNITS, WHICH POLYMER CONTAINS ACTIVE SITES ALONG THE POLYMER CHAINS AS THE ONLY FREE RADICAL INITIATOR PRESENT IN THE POLYMERIZATION MIXTURE, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE GRAFTING COPOLYMERIZATION IN THE PRESENCE OF A MIXTURE OF EACH OF THE COMPOUNDS BASIC CUPRIC OXYCHLORIDE OF THE FORMULA CUCL2.3CU(OH)2 AND CUPROUS OXIDE (CU2O) IN THE SMALL BUT EFFECTIVE AMOUNTS SUFFICIENT TO APPRECIABLY INHIBIT THE FORMATION OF HOMOPOLYMER OF THE MONOMER.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR MAKING A GRAFT COPOLYMER WHICH COMPRISES POLYMERIZING A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER IN THE PRESENCE OF AN ORGANIC POLYMER CONTAINING AT LEAST 20 MONOMER UNITS, WHICH POLYMER CONTAINS ACTIVE SITES ALONG THE POLYMER CHAINS AS THE ONLY FREE RADICAL INITIATOR PRESENT IN THE POLYMERIZATION MIXTURE, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE GRAFTING COPOLYMERIZATION IN THE PRESENCE OF A MIXTURE OF EACH OF THE COMPOUNDS BASIC CUPRIC OXYCHLORIDE OF THE FORMULA CUCL2.3CU(OH)2 AND CUPROUS OXIDE (CU2O) IN THE SMALL BUT EFFECTIVE AMOUNTS SUFFICIENT TO APPRECIABLY INHIBIT THE FORMATION OF HOMOPOLYMER OF THE MONOMER.
References Cited (Backward Citations)
US2837496A
Cited
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 |