US3000867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel ethylene-propylene copolymer and method for producing same
Assignee: EIDP Inc
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Filing: 1959-04-15
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Granted: 1961-09-19
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Expires: 1979-04-15
Abstract
No abstract record available.
Inventors
- 👤 Bruce S Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:47
CPC Classifications
C; C08; C08F; C08F210/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
AN ETHYLENE-PROPYLENE COPOLYMER WHICH IS CAPABLE OF BEING CURED TO AN ELASTOMER, SAID COPOLYMER HAVING AN INTRINSIC VISCOSITY IN TETRACHLOROETHYLENE AT 30*C. OF AT LEAST 1 AND EXHIBITING AN INFRARED ABSORBENCE RATIO RANGING FROM ABOUT 0.85 TO ABOUT 2.0, SAID INFRARED ABSORBENCE RATIO BEING THE RATIO OF THE INFRARED ABSORBENCE AT 8.65 MICRONS TO THE ABSORBENCE AT 2.3 MICRONS OF A FILM OF SAID COPOLYMER ABOUT 0.1 MM. THICK, SAID COPOLYMER BEING PREPARED BY A PROCESS WHICH COMPRISES CONTACTING ETHYLENE AND PROPYLENE, IN A MOLAR RATIO OF 1:1 TO 1:5.7, IN TETRACHLOROETHYLENE AT A TEMPERATURE OF BETWEEN ABOUT 20*C. AND 60*C. WITH A CATALYST PREPARED FROM ALUMINUM TRIISOBUTYL, ALUMINUM CHLORIDE AND VANADYL CHLORIDE, THE MOLE RATIO OF ALUMINUM CHLORIDE TO ALUMINUM TRIISOBUTYL BEING 2:1 AND THE MOLE RATIO OF ALUMINUM TO VANADIUM BEING 5:1.
Claim 2
Dependent Claim
134 words
AN ETHYLENE-PROPYLENE COPOLYMER WHICH IS CAPABLE OF BEING CURED TO AN ELASTOMER, SAID COPOLYMER HAVING AN INTRINSIC VISCOSITY IN TETRACHLOROETHYLENE AT 30*C. OF AT LEAST 1 AND EXHIBITING AN INFRARED ABSORBENCE RATIO RANGING FROM ABOUT 0.85 TO ABOUT 2.0, SAID INFRARED ABSORBENCE RATIO BEING THE RATIO OF THE INFRARED ABSORBENCE AT 8.65 MICRONS TO THE ABSORBENCE AT 2.3 MICRONS OF A FILM OF SAID COPOLYMER ABOUT 0.1 MM. THICK, SAID COPOLYMER BEING PREPARED BY A PROCESS WHICH COMPRISES CONTACTING ETHYLENE AND PROPYLENE, IN A MOLAR RATIO OF 1:1 TO 1:5.7, IN TETRACHLOROETHYLENE AT A TEMPERATURE OF BETWEEN ABOUT 20*C. AND 60*C. WITH A CATALYST PREPARED FROM ALUMINUM TRIISOBUTYL, ALUMINUM CHLORIDE AND VANADYL CHLORIDE, THE MOLE RATIO OF ALUMINUM CHLORIDE TO ALUMINUM TRIISOBUTYL BEING 2:1 AND THE MOLE RATIO OF ALUMINUM TO VANADIUM BEING 5:1.
References Cited (Backward Citations)
US2825721A
Cited
BE538782A
Cited
BE543941A
Cited
US2824089A
Cited
US2888424A
Cited
GB794785A
Cited
US2886561A
Cited
US2890214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |