US3111499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc-oxide-sulfur stabilizer for polyolefin compositions
Assignee: Hoechst AG
•
Filing: 1958-02-05
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Granted: 1963-11-19
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Expires: 1978-02-05
Abstract
No abstract record available.
Inventors
- 👤 Heuck Claus
- 👤 Stark Ernst
- 👤 Doppler Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:22
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/02; C08K3/06; C08K5/00; C08K5/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS OF STABILIZING A LOW PRESSURE POLYOLEFIN AGAINST AGEING AND EMBRITTLEMENT, SAID LOW PRESSURE POLYOLEFIN BEING PREPARED BY POLYMERIZING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND PROPYLENE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST PREPARED BY MIXING AN ORGANO-METALLIC COMPOUND WITH A COMPOUND OF A METAL OF SUBGROUPS IV-VIII OF THE PERIODIC TABLE, SAID PROCESS COMPRISING INCORPORATING INTO SAID POLYOLEFIN PRIOR TO THE PREPARATION OF A SHAPED ARTICLE THEREFROM 0.5-0.67% BY WEIGHT, BASED ON THE WEIGHT OF THE POLYMER, OF ZINC OXIDE AND 0.1-0.133% BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SULFUR, SELENIUM, AND TELLURIUM.
Claim 2
Dependent Claim
106 words
A PROCESS OF STABILIZING A LOW PRESSURE POLYOLEFIN AGAINST AGEING AND EMBRITTLEMENT, SAID LOW PRESSURE POLYOLEFIN BEING PREPARED BY POLYMERIZING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND PROPYLENE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST PREPARED BY MIXING AN ORGANO-METALLIC COMPOUND WITH A COMPOUND OF A METAL OF SUBGROUPS IV-VIII OF THE PERIODIC TABLE, SAID PROCESS COMPRISING INCORPORATING INTO SAID POLYOLEFIN PRIOR TO THE PREPARATION OF A SHAPED ARTICLE THEREFROM 0.5-0.67% BY WEIGHT, BASED ON THE WEIGHT OF THE POLYMER, OF ZINC OXIDE AND 0.1-0.133% BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SULFUR, SELENIUM, AND TELLURIUM.
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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) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |