Patent US3338877A successfully refreshed from Google Patents.
US3338877A
Expired / Lapsed
US
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Copolymers of ethylene/stilbene
Assignee: Shell USA Inc
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Filing: 1966-05-31
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Granted: 1967-08-29
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Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 William S Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/32; C08F10/00; C10; C10M; C10M143/00; C10M143/10; C10M2205/00; C10M2205/04; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/08; C10M2219/082; C10M2219/083; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/047; C10M2223/06; C10M2223/065; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/04; C10N2030/00; C10N2030/32; C10N2040/00; C10N2040/08; C10N2040/135; C10N2040/14; C10N2040/16; C10N2040/17; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
A COPOLYMER OF ETHYLENE AND STILBENE CONTAINING A PLURALITY OF UNITS OF THE FORMULA
Claim 2
Dependent Claim
14 words
A COPOLYMER OF ETHYLENE AND STILBENE CONTAINING A PLURALITY OF UNITS OF THE FORMULA
Claim 3
Dependent Claim
99 words
A PROCESS FOR PREPARING A COPOLYMER OF ETHYLENE AND STILBENE HAVING A MOLECULE WEIGHT OF FROM ABOUT 1000 TO ABOUT 1,000,000 WHICH COMPRISES REACTING ETHYLENE AND STILBENE IN A MOLE RATION OF FROM 1:10 TO 10.1 AT A TEMPERATURE OF FROM -40*C. TO 50*C. AND AT A PRESSURE OF FROM 5,000 TO 100,000 P.S.I. IN THE PRESENCE OF AN ORGANO LITHIUM CATALYST AND A SOLVENT MIXTURE COMPRISING AN AROMATIC HYDROCARBON AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIMETHYL ETHER, DIETHYL ETHER, DIOXANE, DIETHYL ETHER OF DIETHYLENE GLYCOL, TETRAHYDROFURAN, DIPHENYLENE OXIDE, TRIETHYLENE AMINE, THIETHYLENEDIAMINE, DIETHYL SULFIDE AND TETRAHYDROTHIOPHENE.
Claim 4
Dependent Claim
99 words
A PROCESS FOR PREPARING A COPOLYMER OF ETHYLENE AND STILBENE HAVING A MOLECULE WEIGHT OF FROM ABOUT 1000 TO ABOUT 1,000,000 WHICH COMPRISES REACTING ETHYLENE AND STILBENE IN A MOLE RATION OF FROM 1:10 TO 10.1 AT A TEMPERATURE OF FROM -40*C. TO 50*C. AND AT A PRESSURE OF FROM 5,000 TO 100,000 P.S.I. IN THE PRESENCE OF AN ORGANO LITHIUM CATALYST AND A SOLVENT MIXTURE COMPRISING AN AROMATIC HYDROCARBON AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIMETHYL ETHER, DIETHYL ETHER, DIOXANE, DIETHYL ETHER OF DIETHYLENE GLYCOL, TETRAHYDROFURAN, DIPHENYLENE OXIDE, TRIETHYLENE AMINE, THIETHYLENEDIAMINE, DIETHYL SULFIDE AND TETRAHYDROTHIOPHENE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |