Patent DE871249C successfully refreshed from Google Patents.
US3655834A
Expired / Lapsed
US
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Lowering the molecular weight of high molecular weight polyethylene in the powder phase
Assignee: BASF SE
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Filing: 1969-11-13
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Granted: 1972-04-11
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Expires: 1989-11-13
Abstract
Abstract LOWERING THE MOLECULAR WEIGHT OF HIGH MOLECULAR WEIGHT POLYETHYLENE BY SWELLING PARTICLES OF POLYETHYLENE WITH AN ORGANIC SOLVENT AND HEATING THE PARTICLES IN AN OXYGEN ATMOSPHERE AT ELEVATED TEMPERATURE. POLYETHYLENE THIS OBTAINED IS MORE EASILY PROCESSED IN EXTRUDERS.
Inventors
- 👤 Karl Wisseroth
- 👤 Richard Scholl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:40
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/50; Y; Y10; Y10S; Y10S526/00; Y10S526/914
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |