US3014885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high density polyethylene composition containing organic peroxide cross-linking agent
Assignee: Cabot Corp
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Filing: 1957-07-17
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Granted: 1961-12-26
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Expires: 1977-07-17
Abstract
No abstract record available.
Inventors
- 👤 Merrill E Jordan
- 👤 Frank R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:26
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08K; C08K5/00; C08K5/04; C08K5/14; C08L2205/00; C08L2205/02; C08L2205/025; C08L2312/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS FOR PRODUCING A SUBSTANTIALLY COMPLETELY UNCROSSLINKED POLYMERIC COMPOSITION WHICH IS CAPABLE OF BEING FABRICATED AND EXTRUDED BY CONVENTIAL PLASTIC WORKING APPARATUS AND STRENGTHENED BY CROSSLINKING ON SUBSEQUENT HEAT TREATMENT, WHICH COMPRISES FLUXING AND MILLING LOW DENSITY POLYETHYLENE HAVING A SPECIFIC GRAVITY BETWEEN ABOUT 0.885 AND 0.92 AT A TEMPERATURE BELOW ABOUT 275* F. WHILE ADDING THERETO SUFFICIENT HIGH DENSITY POLYETHYLENE HAVING A DENSITY BETWEEN ABOUT 0.94 AND 0.96 TO PROVIDE A MIXTURE COMPRISING FROM ABOUT 60% TO ABOUT 90% HIGH DENSITY POLYETHYLENE, AND MILLING INTO SAID MIXTURE WHILE FLUXING AT A TEMPERATURE BELOW ABOUT 275* F. AND ORGANIC PEROXIDE CROSSLINKING AGENT WHICH CANNOT BE EXPOSED TO TEMPERATURES ABOVE 275* F. IN THE PRESENCE OF POLYETHYLENE WITHOUT EFFECTING CROSSLINKING THEREOF.
Claim 2
Dependent Claim
121 words
A PROCESS FOR PRODUCING A SUBSTANTIALLY COMPLETELY UNCROSSLINKED POLYMERIC COMPOSITION WHICH IS CAPABLE OF BEING FABRICATED AND EXTRUDED BY CONVENTIAL PLASTIC WORKING APPARATUS AND STRENGTHENED BY CROSSLINKING ON SUBSEQUENT HEAT TREATMENT, WHICH COMPRISES FLUXING AND MILLING LOW DENSITY POLYETHYLENE HAVING A SPECIFIC GRAVITY BETWEEN ABOUT 0.885 AND 0.92 AT A TEMPERATURE BELOW ABOUT 275* F. WHILE ADDING THERETO SUFFICIENT HIGH DENSITY POLYETHYLENE HAVING A DENSITY BETWEEN ABOUT 0.94 AND 0.96 TO PROVIDE A MIXTURE COMPRISING FROM ABOUT 60% TO ABOUT 90% HIGH DENSITY POLYETHYLENE, AND MILLING INTO SAID MIXTURE WHILE FLUXING AT A TEMPERATURE BELOW ABOUT 275* F. AND ORGANIC PEROXIDE CROSSLINKING AGENT WHICH CANNOT BE EXPOSED TO TEMPERATURES ABOVE 275* F. IN THE PRESENCE OF POLYETHYLENE WITHOUT EFFECTING CROSSLINKING THEREOF.
References Cited (Backward Citations)
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Cited
GB597833A
Cited
GB619905A
Cited
US2512459A
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US2788340A
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US2725374A
Cited
US2888424A
Cited
US2791576A
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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) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |