Patent US2128412A successfully refreshed from Google Patents.
US2889259A
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Process for the chloro-sulfonation of polyethylene
Assignee: Ruhrchemie AG
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Filing: 1956-02-08
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Granted: 1959-06-02
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Expires: 1976-02-08
Abstract
No abstract record available.
Inventors
- 👤 Noeske Heinz
- 👤 Roelen Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:20
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR THE CHLORO-SULFONATION OF POLYETHYLENE HAVING A MOLECULAR WEIGHT OF 80,000 TO 1,400,000, AS OBTAINED BY THE POLYMERIZATION OF ETHYLENE AT PRESSURES UP TO 100 ATMOSPHERES AND AT TEMPERATURES BELOW 100* C. AND IN THE PRESENCE OF CATALYST CONSISTING OF MIXTURES OF ALUMINA ALKYL COMPOUNDS WITH TITANIUM TETRACHLORIDE, WHICH CONSISTS OF TREATING FINELY POWDERED POLYETHYLENE WITH A MIXTURE OF GASEOUS CHLORINE AND GASEOUS SULFUR DIOXIDE AT TEMPERATURES NOT SUBSTANTIALLY IN EXCESS OF 100*C., IN THE ABSENCE OF SOLVETS AND WHILE MAINTAINING SAID POLYETHYLENE AS A FLUIDIZED BED.
Claim 2
Dependent Claim
89 words
A PROCESS FOR THE CHLORO-SULFONATION OF POLYETHYLENE HAVING A MOLECULAR WEIGHT OF 80,000 TO 1,400,000, AS OBTAINED BY THE POLYMERIZATION OF ETHYLENE AT PRESSURES UP TO 100 ATMOSPHERES AND AT TEMPERATURES BELOW 100* C. AND IN THE PRESENCE OF CATALYST CONSISTING OF MIXTURES OF ALUMINA ALKYL COMPOUNDS WITH TITANIUM TETRACHLORIDE, WHICH CONSISTS OF TREATING FINELY POWDERED POLYETHYLENE WITH A MIXTURE OF GASEOUS CHLORINE AND GASEOUS SULFUR DIOXIDE AT TEMPERATURES NOT SUBSTANTIALLY IN EXCESS OF 100*C., IN THE ABSENCE OF SOLVETS AND WHILE MAINTAINING SAID POLYETHYLENE AS A FLUIDIZED BED.
References Cited (Backward Citations)
US2212786A
Cited
US2799640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |