US3137674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene modified with a vinyl compound
Assignee: WR Grace and Co
•
Filing: 1960-12-09
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Granted: 1964-06-16
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Expires: 1980-12-09
Abstract
No abstract record available.
Inventors
- 👤 Nelson S Marans
- 👤 William D Addy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10S8/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
THE PROCESS OF MODIFYING POLYETHYLENE WHICH COMPRISES IN AN INERT ATMOSPHERE IRRADIATING WITH HIGH ENERGY IONIZING PARTICLE RADIATION POLYETHYLENE TO FORM TRAPPED FREE RADICALS THEREIN IN THE PRESENCE OF A COMPOUND CONTAINING AT LEAST TWO ALLYLIC GROUPS AND THEREAFTER SUBJECTING THE THUS-IRRADIATED POLYMER TO GRAFTING BY HEATING THE THUS IRRADIATED POLYMER IN THE PRESENCE OF A MONOMERIC VINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, N-VINYL-2-PYRROLIDONE, 2-VINYLPYRIDINE, ETHYL METHACRYLATE, METHYL ACRYLATE AND ETHYL ACRYLATE AT TEMPERATURES BELOW THE CRYSTALLINE MELTING POINT OF THE POLYMER.
Claim 2
Dependent Claim
86 words
THE PROCESS OF MODIFYING POLYETHYLENE WHICH COMPRISES IN AN INERT ATMOSPHERE IRRADIATING WITH HIGH ENERGY IONIZING PARTICLE RADIATION POLYETHYLENE TO FORM TRAPPED FREE RADICALS THEREIN IN THE PRESENCE OF A COMPOUND CONTAINING AT LEAST TWO ALLYLIC GROUPS AND THEREAFTER SUBJECTING THE THUS-IRRADIATED POLYMER TO GRAFTING BY HEATING THE THUS IRRADIATED POLYMER IN THE PRESENCE OF A MONOMERIC VINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, N-VINYL-2-PYRROLIDONE, 2-VINYLPYRIDINE, ETHYL METHACRYLATE, METHYL ACRYLATE AND ETHYL ACRYLATE AT TEMPERATURES BELOW THE CRYSTALLINE MELTING POINT OF THE POLYMER.
Claim 3
Dependent Claim
54 words
THE PROCESS OF MODIFYING POLYETHYLENE WHICH COMPRISES IMBIBING DIALLY PHTHALATE INTO POLYETHYLENE, SUBJECTING THE THUS TREATED POLYETHYLENE TO IRRADIATION WITH HIGH ENERGY IONIZING PARTICLE RADIATION TO FORM TRAPPED FREE RADICALS THEREIN IN AN INERT ATMOSPHERE AND THEREAFTER HEATING THE THUS IRRADIATED POLYETHYLENE AT A TEMPERATURE OF ABOUT 70*C. IN THE PRESENCE OF METHYL ACRYLATE.
Claim 4
Dependent Claim
54 words
THE PROCESS OF MODIFYING POLYETHYLENE WHICH COMPRISES IMBIBING DIALLY PHTHALATE INTO POLYETHYLENE, SUBJECTING THE THUS TREATED POLYETHYLENE TO IRRADIATION WITH HIGH ENERGY IONIZING PARTICLE RADIATION TO FORM TRAPPED FREE RADICALS THEREIN IN AN INERT ATMOSPHERE AND THEREAFTER HEATING THE THUS IRRADIATED POLYETHYLENE AT A TEMPERATURE OF ABOUT 70*C. IN THE PRESENCE OF METHYL ACRYLATE.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |