US3398115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefins stabilized with mixtures comprising an organic phosphorus acid, phosphite triester and thiodipropionate
Assignee: Argus Chemical Corp
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Filing: 1965-08-27
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Granted: 1968-08-20
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Expires: 1985-08-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Hecker
- 👤 Norman L Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A STABILIZER COMBINATION FOR USE IN IMPROVING THE RESISTANCE OF OLENIFIC POLYMERS TO DETERIORATE IN PHYSICAL PROPERTIES ON EXPOSURE TO HEAT, CONSISTING ESSENTIALLY OF FROM ABOUT 0.1 TO ABOUT 25 PARTS BY WEIGHT OF AN ORGANIC PHOSPHORUS ACID CONTAINING TRIVALENT PHOSPHORUS, AND FROM ABOUT 2.4 TO ABOUT 175 PARTS BY WEIGHT ON AN ORGANIC PHOSPHITE TRIESTER, THE STABILIZERS BEING COMPATIBLE WITH POLYPROPYLENE AND HAVING A LOW VAPOR PRESSURE AT POLYPROPYLENE WORKING TEMPERATURES.
Claim 2
Dependent Claim
72 words
A STABILIZER COMBINATION FOR USE IN IMPROVING THE RESISTANCE OF OLENIFIC POLYMERS TO DETERIORATE IN PHYSICAL PROPERTIES ON EXPOSURE TO HEAT, CONSISTING ESSENTIALLY OF FROM ABOUT 0.1 TO ABOUT 25 PARTS BY WEIGHT OF AN ORGANIC PHOSPHORUS ACID CONTAINING TRIVALENT PHOSPHORUS, AND FROM ABOUT 2.4 TO ABOUT 175 PARTS BY WEIGHT ON AN ORGANIC PHOSPHITE TRIESTER, THE STABILIZERS BEING COMPATIBLE WITH POLYPROPYLENE AND HAVING A LOW VAPOR PRESSURE AT POLYPROPYLENE WORKING TEMPERATURES.
Claim 3
Dependent Claim
25 words
A STABILIZER COMBINATION IN ACCORDANCE WITH CLAIM 1 INCLUDING IN ADDITION FROM ABOUT 5 TO ABOUT 100 PARTS BY WEIGHT OF A THIODIPROPIONIC ACID ESTER.
References Cited (Backward Citations)
US2462331A
Cited
US2860115A
Cited
US3069369A
Cited
FR1235047A
Cited
US3033814A
Cited
US3349058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |