Patent US3597408A successfully refreshed from Google Patents.
US3597408A
Expired / Lapsed
US
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Continuous chlorination of polyethylene
Assignee: BASF SE
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Filing: 1968-08-26
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Granted: 1971-08-03
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Expires: 1988-08-26
Abstract
Abstract A CONTINUOUS PROCESS FOR THE CHLORINATION OF RELATIVELY COARSE PARTICLED HIGH PRESSURE POLYETHYLENE AS A SUSPENSION OF 2-6 MM. PARTICLES IN A LIQUID CHLOROHYDROCARBON WITH WITHDRAWAL OF THE CHLORINATED POLYETHYLENE AS A SOLUTION IN THE CHLOROHYDROCARBON.
Inventors
- 👤 Hans-Georg Trieschmann
- 👤 Gerhard Zeitler
- 👤 Lothar Reuter
- 👤 Heiner Dickhaeuser
- 👤 Helmut Pfannmueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:27
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |