Patent US6109270A successfully refreshed from Google Patents.
US3227781A
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Process of chlorination of highly crystalline polyethylene and product thereof
Assignee: Hoechst AG
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Filing: 1958-09-17
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Granted: 1966-01-04
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Expires: 1978-09-17
Abstract
No abstract record available.
Inventors
- 👤 Klug Helmut
- 👤 Mittelberger Karl-Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:09
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/26; C09D123/28; C09D123/286; C08; C08F; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCOESS FOR THE MANUFACTURE OF CHLORINATED POLYETHYLENE WHICH COMPRISES SUSPENDIG SUBSTANTIALLY LINEAR POLYETHYLENE HAVING A HIGH DEGREE OF CRYSTALLINITY IN 3-30 PARTS BY WEIGHT OF WATER FOR EACH PART BY WEIGHT OF POLYETHYLENE, TREATING THIS POLYETHYLENE WITH CHLORINE IN A FIRST STAGE AT A TEMPERATURE BETWEEN 50-110*C. UP TO A CHLORINE CONTENT OF AT LEAST 10 PERCENT BY WEIGHT OF THE POLYETHYLENE, AND TERMINATING THE CHLORINATION IN A SECOND STAGE AT A TEMPERATURE BETWEEN 110-150*C.
Claim 2
Dependent Claim
76 words
A PROCOESS FOR THE MANUFACTURE OF CHLORINATED POLYETHYLENE WHICH COMPRISES SUSPENDIG SUBSTANTIALLY LINEAR POLYETHYLENE HAVING A HIGH DEGREE OF CRYSTALLINITY IN 3-30 PARTS BY WEIGHT OF WATER FOR EACH PART BY WEIGHT OF POLYETHYLENE, TREATING THIS POLYETHYLENE WITH CHLORINE IN A FIRST STAGE AT A TEMPERATURE BETWEEN 50-110*C. UP TO A CHLORINE CONTENT OF AT LEAST 10 PERCENT BY WEIGHT OF THE POLYETHYLENE, AND TERMINATING THE CHLORINATION IN A SECOND STAGE AT A TEMPERATURE BETWEEN 110-150*C.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |