US3081242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft co-polymers
Assignee: BX Plastics Ltd
•
Filing: 1958-08-20
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Granted: 1963-03-12
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Expires: 1978-08-20
Abstract
No abstract record available.
Inventors
- 👤 Smith Robert Roy
- 👤 Mann Dennis Charles Macmillan
- 👤 Salmon John Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:24
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/18; C08F291/185; C07; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR THE MANUFACTURE OF GRAFT CO-POLYMERS, WHICH COMPRISES SUBJECTING A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE, CELLULOSE, CELLULOSE ACETATE, CELLULOSE TRIACETATE, POLYVINYL CHLORIDE, POLYAMIDES, POLYSTYRENE, RUBBER AND POLYMETHYLMETHACRYLATE, IN THE PRESENCE OF OXYGEN, TO HIGH ENERGY, IONISING RADIATION TO A DOSE AT LEAST SUFFICIENT TO PRODUCE POLYMERISATION NITIATING PEROXIDISED ACTIVE CENTRES ON THE POLYMER, TREATING THE PEROXIDISED POLYMER SO PRODUCED WITH AN EXCESS OF A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHYLENE DICHLORIDE AND ACETONE AND IN WHICH IT IS INSOLUBLE, AT A TEMPERATURE WITHIN THE RANGE OF ROOM TEMPERATURE TO 100* C. AND NOT EXCEEDING THE SOFTENING POINT OF THE POLYMER, UNIT THE SMALL PROPORTION OF SOLUBLE PEROXIDE MATE RIAL PRODUCED ON IRRADIATION HAS BEEN EXTRACTED, AND SUBSEQUENTLY CONTACTING THE SOLVENT-TREATED POLYMER WITH A GRAFTING MATERIAL CAPABLE OF BEING POLYMERISED BY FREE RADICALS.
Claim 2
Dependent Claim
139 words
A PROCESS FOR THE MANUFACTURE OF GRAFT CO-POLYMERS, WHICH COMPRISES SUBJECTING A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE, CELLULOSE, CELLULOSE ACETATE, CELLULOSE TRIACETATE, POLYVINYL CHLORIDE, POLYAMIDES, POLYSTYRENE, RUBBER AND POLYMETHYLMETHACRYLATE, IN THE PRESENCE OF OXYGEN, TO HIGH ENERGY, IONISING RADIATION TO A DOSE AT LEAST SUFFICIENT TO PRODUCE POLYMERISATION NITIATING PEROXIDISED ACTIVE CENTRES ON THE POLYMER, TREATING THE PEROXIDISED POLYMER SO PRODUCED WITH AN EXCESS OF A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHYLENE DICHLORIDE AND ACETONE AND IN WHICH IT IS INSOLUBLE, AT A TEMPERATURE WITHIN THE RANGE OF ROOM TEMPERATURE TO 100* C. AND NOT EXCEEDING THE SOFTENING POINT OF THE POLYMER, UNIT THE SMALL PROPORTION OF SOLUBLE PEROXIDE MATE RIAL PRODUCED ON IRRADIATION HAS BEEN EXTRACTED, AND SUBSEQUENTLY CONTACTING THE SOLVENT-TREATED POLYMER WITH A GRAFTING MATERIAL CAPABLE OF BEING POLYMERISED BY FREE RADICALS.
References Cited (Backward Citations)
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US2841569A
Cited
FR1130100A
Cited
US2878174A
Cited
US2907675A
Cited
US2863812A
Cited
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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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |