US3282889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di beta naphthyl-p-phenylene diamine stabilized propylene polymers
Assignee: FMC Corp
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Filing: 1964-08-12
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Granted: 1966-11-01
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Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Tomlinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS COMPRISING MIXING A SOLID, SUBSTANTIALLY CRYSTALLINE POLYMER OF PROPYLENE WITH A STABILIZING QUANTITY COMPRISING FROM ABOUT 0.05% TO ABOUT 5.0% BY WEIGHT OF DI-BETA-NAPHTHYL-PARA-PHENYLENE DIAMINE, MELTING THE RESULTING MIXTURE, AND FORMING FROM SAID MELTED MIXTURE FIBERS HAVING IMPROVED RESISTANCE TO ENVIRONMENTAL FACTORS CAUSING DEGRADATION, SAID CRYSTALLINE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF PROPYLENE HOMOPOLYMERS AND BLOCK COPOLYMERS OF PROPYLENE AND AT LEAST ONE ALPHA-OLEFIN FROM THE GROUP CONSISTING OF ETHYLENE AND ALPHA-OLEFINS HAVING BETWEEN 4 AND 10 CARBON ATOMS.
Claim 2
Dependent Claim
83 words
A PROCESS COMPRISING MIXING A SOLID, SUBSTANTIALLY CRYSTALLINE POLYMER OF PROPYLENE WITH A STABILIZING QUANTITY COMPRISING FROM ABOUT 0.05% TO ABOUT 5.0% BY WEIGHT OF DI-BETA-NAPHTHYL-PARA-PHENYLENE DIAMINE, MELTING THE RESULTING MIXTURE, AND FORMING FROM SAID MELTED MIXTURE FIBERS HAVING IMPROVED RESISTANCE TO ENVIRONMENTAL FACTORS CAUSING DEGRADATION, SAID CRYSTALLINE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF PROPYLENE HOMOPOLYMERS AND BLOCK COPOLYMERS OF PROPYLENE AND AT LEAST ONE ALPHA-OLEFIN FROM THE GROUP CONSISTING OF ETHYLENE AND ALPHA-OLEFINS HAVING BETWEEN 4 AND 10 CARBON ATOMS.
References Cited (Backward Citations)
US2985617A
Cited
US3029224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |