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US3293206A
Expired / Lapsed
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Stabilized polyethylene compositions having anti-block characteristics
Assignee: Monsanto Co
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Filing: 1963-12-06
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Granted: 1966-12-20
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Expires: 1983-12-06
Abstract
No abstract record available.
Inventors
- 👤 Horne Shaffer Evatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:02
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD FOR IMPROVING THE ANTI-BLOCK CHARACTERISTICS OF POLYETHYLENE WITHOUT PROMOTING DEGRADATION UNDER CONDITIONS OF ELEVATED TEMPERATURE AND MECHANICAL WORKING WHICH COMPRISES INCORPORATION IN SAID POLYETHYLENE FROM ABOUT 0.01 TO ABOUT 1.0% BY WEIGHT OF A DIATOMACEOUS EARTH WHICH HAS BEEN TREATED BY INTIMATELY ADMIXING SAID DIATOMACEOUS EARTH AS ATMOSPHERIC PRESSURE AND TEMPERATURE WITH AN EXCESS OF AN AQUEOUS ALKALINE SOLUTION HAVING A CONCENTRATION FROM ABOUT 1% TO ABOUT 50% OF AN ALKALI SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND THE ALKALI METAL AND ALKALINE EARTH METAL HYDROXIDES, CARBONATES AND PHOSPHATES, SEPARATING SAID DIATOMACEOUS EARTH FROM SAID SOLUTION BY FILTRATION, WASHING IT WITH AN EXCESS OF WATER, AND THEN HEATING IT TO DRYNESS AT A TEMPERATURE FROM ABOUT 100* TO 150*C.
Claim 2
Independent Claim
122 words
A METHOD FOR IMPROVING THE ANTI-BLOCK CHARACTERISTICS OF POLYETHYLENE WITHOUT PROMOTING DEGRADATION UNDER CONDITIONS OF ELEVATED TEMPERATURE AND MECHANICAL WORKING WHICH COMPRISES INCORPORATION IN SAID POLYETHYLENE FROM ABOUT 0.01 TO ABOUT 1.0% BY WEIGHT OF A DIATOMACEOUS EARTH WHICH HAS BEEN TREATED BY INTIMATELY ADMIXING SAID DIATOMACEOUS EARTH AS ATMOSPHERIC PRESSURE AND TEMPERATURE WITH AN EXCESS OF AN AQUEOUS ALKALINE SOLUTION HAVING A CONCENTRATION FROM ABOUT 1% TO ABOUT 50% OF AN ALKALI SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND THE ALKALI METAL AND ALKALINE EARTH METAL HYDROXIDES, CARBONATES AND PHOSPHATES, SEPARATING SAID DIATOMACEOUS EARTH FROM SAID SOLUTION BY FILTRATION, WASHING IT WITH AN EXCESS OF WATER, AND THEN HEATING IT TO DRYNESS AT A TEMPERATURE FROM ABOUT 100* TO 150*C.
References Cited (Backward Citations)
US3012003A
Cited
US3028355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |