Patent US2935502A successfully refreshed from Google Patents.
US2935502A
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Process for the high temperature, high pressure shear degradation of solid polyethylene
Assignee: Union Carbide Corp
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Filing: 1958-02-05
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Granted: 1960-05-03
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Expires: 1978-02-05
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Reding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:28
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/50; B; B29; B29C; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/92704; B29C2948/92819; B29C2948/92857; C08F2810/00; C08F2810/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR THE HIGH TEMPERATURE, HIGH PRESSURE SHEAR DEGRADATION OF SOLID POLYETHYLENE, WHICH COMPRISES PREFERENTIALLY SHEAR DEGRADING THE VERY HIGH MOLECULAR WEIGHT, MICROGEL MOLECULES BY EXTRUDING THE MOLTEN POLYETHYLENE UNDER A PRESSURE OF FROM ABOUT 20,000 P.S.I. TO ABOUT 60,000 P.S.I. AND AT A TEMPERTURE OF FROM ABOUT 100*C. TO ABOUT 300*C. THROUGH A CHANNEL AT LEAST ABOUT 2 INCHES LONG HAVING CROSS-SECTIONAL DIMENSIONS NOT GREATER THAN 0.03 INCH.
Claim 2
Dependent Claim
70 words
A PROCESS FOR THE HIGH TEMPERATURE, HIGH PRESSURE SHEAR DEGRADATION OF SOLID POLYETHYLENE, WHICH COMPRISES PREFERENTIALLY SHEAR DEGRADING THE VERY HIGH MOLECULAR WEIGHT, MICROGEL MOLECULES BY EXTRUDING THE MOLTEN POLYETHYLENE UNDER A PRESSURE OF FROM ABOUT 20,000 P.S.I. TO ABOUT 60,000 P.S.I. AND AT A TEMPERTURE OF FROM ABOUT 100*C. TO ABOUT 300*C. THROUGH A CHANNEL AT LEAST ABOUT 2 INCHES LONG HAVING CROSS-SECTIONAL DIMENSIONS NOT GREATER THAN 0.03 INCH.
References Cited (Backward Citations)
US2367173A
Cited
US2799668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |