Patent US3337649A successfully refreshed from Google Patents.
US3337649A
Expired / Lapsed
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Graft copolymer preparation through free radicals
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1960-09-27
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Granted: 1967-08-22
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Expires: 1980-09-27
Abstract
No abstract record available.
Inventors
- 👤 James F Black
- 👤 Israel S Ungar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:12
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR PREPARING A GRAFT COPOLYMER WHICH COMPRISES SUBJECTING A POLYMER OF METHYL METHACRYLATE DISSOLVED IN BENZENE TO HIGH ENERGY IONIZING RADIATION AND THEREAFTER CONTACING THE IRRADIATED SOLUTION WITH NVINYL PYRROLIDONE, SAID IRRADIATION BEING CONDUCTED AT A TEMPERATURE LESS THAN 100*F. AND AT A RADIATION RATE IN THE RANGE OF FROM 0.01 TO 100 MEGAREP PER MINUTE FOR A TOTAL DOSAGE IN THE RANGE OF FROM 1X10**5 TO 1X10**9 REP.
Claim 2
Dependent Claim
71 words
A PROCESS FOR PREPARING A GRAFT COPOLYMER WHICH COMPRISES SUBJECTING A POLYMER OF METHYL METHACRYLATE DISSOLVED IN BENZENE TO HIGH ENERGY IONIZING RADIATION AND THEREAFTER CONTACING THE IRRADIATED SOLUTION WITH NVINYL PYRROLIDONE, SAID IRRADIATION BEING CONDUCTED AT A TEMPERATURE LESS THAN 100*F. AND AT A RADIATION RATE IN THE RANGE OF FROM 0.01 TO 100 MEGAREP PER MINUTE FOR A TOTAL DOSAGE IN THE RANGE OF FROM 1X10**5 TO 1X10**9 REP.
References Cited (Backward Citations)
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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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |