Patent US610681A successfully refreshed from Google Patents.
Patent US3280087A successfully refreshed from Google Patents.
US3280087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically active polymers and process for obtaining the same
Assignee: Montedison SpA
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Filing: 1961-11-28
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Granted: 1966-10-18
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Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Farina Mario
- 👤 Donati Mario
- 👤 Bressan Giancarlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:01
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; B; B01; B01D; B01D39/00; B01D39/02; B01D39/04; B01J; B01J20/00; B01J20/22; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; C08F136/00; C08F136/02; C08F136/04; C08F136/14; C08F20/00; C08F20/62; C08F244/00; C08F4/00; C08F4/06; C08F4/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
LINEAR, POLYISOTATIC OPTICALLY ACTIVE HOMOPOLYMERS SELCTED FROM THE GROUP CONSISTING OF POLY(BENZOFURANE) POLY(METHYSORBATE) POLY(BUTYLSORBATE) POLY(BUTYL-BETA-STRYL ACRYLATE) POLY(METHYL-BETA-STYRYL ACRYLATE) POLY(METHYL-BETA-VINYLACRYLATE)AND POLY(TRANS-PENTADIENE), SAID HOMOPOLYMERS BEING CHARACTERIZED BY HAVING ASYMMETRIC CARBON ATOMS ONLY IN THE MAIN CHAIN, WHICH ASYMMETIC CARBON ATOMS ARE FROMED BY OPENING OF THE $-BOND OF THE CORRESPONDING UNSATURATED OPTICALLY INACTIVE MONOMERS DURING POLYMERIZATION, WITH SUCCESSIVE PASSAGE OF THE ATOM FROM A PLANAR TO A TETRAHEDRAL CONFIGURATION, SAID HOMOPOLYMERS BEING FURTHER CHARACTERIZED IN BEING SOLUBLE IN AT LEAST ONE SOLVENT SELECTED FROM THE GROUP CONSISTING OF CHLOROFORM AND BENZENE.
Claim 2
Dependent Claim
89 words
LINEAR, POLYISOTATIC OPTICALLY ACTIVE HOMOPOLYMERS SELCTED FROM THE GROUP CONSISTING OF POLY(BENZOFURANE) POLY(METHYSORBATE) POLY(BUTYLSORBATE) POLY(BUTYL-BETA-STRYL ACRYLATE) POLY(METHYL-BETA-STYRYL ACRYLATE) POLY(METHYL-BETA-VINYLACRYLATE)AND POLY(TRANS-PENTADIENE), SAID HOMOPOLYMERS BEING CHARACTERIZED BY HAVING ASYMMETRIC CARBON ATOMS ONLY IN THE MAIN CHAIN, WHICH ASYMMETIC CARBON ATOMS ARE FROMED BY OPENING OF THE $-BOND OF THE CORRESPONDING UNSATURATED OPTICALLY INACTIVE MONOMERS DURING POLYMERIZATION, WITH SUCCESSIVE PASSAGE OF THE ATOM FROM A PLANAR TO A TETRAHEDRAL CONFIGURATION, SAID HOMOPOLYMERS BEING FURTHER CHARACTERIZED IN BEING SOLUBLE IN AT LEAST ONE SOLVENT SELECTED FROM THE GROUP CONSISTING OF CHLOROFORM AND BENZENE.
Claim 3
Dependent Claim
172 words
A PROCESS FOR POLYMERIZING AN OPTICALLY INACTIVE UNSATURATED MONOMER CONTAINING NO ASYMMETRIC CARBON ATOM AND SELECTED FROM THE GROUP CONSISTING OF BENZO FURANE, METHYLSORBATE, BUTLSORBATE, BUTYL-BETA-STYRYL FURANE, METHYLSORBATE, BUTYLSORBATE, BUTYL-BETA-STYRL ACRYLATE AND RANSPENTADIENE, TO A LINEAR, OPTICALLY ACTIVE ACRYLATE AND TRANSPENTADIENE, TO A LINEAR, OPTICALLY ACTIVE HOMOPLYMER HAVING ASYMMETRIC CARBON ATOMS ONLY IN THE MAIN CHAIN AND FORMED BY OPENING THE $-BOND OF THE MONOMER DURING THE POLYMERIZATION, WHICH PROCESS COMPRISES POLYMERIZING THE MONOMER IN CONTACT WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF (S) ISOAMYL LITHIUM MENTHYL LITHIUM TRIS(S)-ISOAMYL ALUMINUM ETHERATE A COMPLEX OF BUTYL LITHIUM WITH (-) METHYL ETHYL EHTER A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH BETA-PHENYLALANINE A COMPLEX OF ALUMINUM TRIBROMIDE WITH BETA-PHENYLALANINE A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH TETRAMETHYL AMMONIUM CAMPHORSULFONATE A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH CAMPHORSULFONIC ACID A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH (-) BRUCINE A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH (-) METHYL BUTYL BENZYLPHENYL AMMONIUM IODIDE, AND A COMPLEX OF BORON FLUORIDE ETHYL ETHERATE WITH (-) METHYL ETHYL ETHER.
Claim 4
Dependent Claim
172 words
A PROCESS FOR POLYMERIZING AN OPTICALLY INACTIVE UNSATURATED MONOMER CONTAINING NO ASYMMETRIC CARBON ATOM AND SELECTED FROM THE GROUP CONSISTING OF BENZO FURANE, METHYLSORBATE, BUTLSORBATE, BUTYL-BETA-STYRYL FURANE, METHYLSORBATE, BUTYLSORBATE, BUTYL-BETA-STYRL ACRYLATE AND RANSPENTADIENE, TO A LINEAR, OPTICALLY ACTIVE ACRYLATE AND TRANSPENTADIENE, TO A LINEAR, OPTICALLY ACTIVE HOMOPLYMER HAVING ASYMMETRIC CARBON ATOMS ONLY IN THE MAIN CHAIN AND FORMED BY OPENING THE $-BOND OF THE MONOMER DURING THE POLYMERIZATION, WHICH PROCESS COMPRISES POLYMERIZING THE MONOMER IN CONTACT WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF (S) ISOAMYL LITHIUM MENTHYL LITHIUM TRIS(S)-ISOAMYL ALUMINUM ETHERATE A COMPLEX OF BUTYL LITHIUM WITH (-) METHYL ETHYL EHTER A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH BETA-PHENYLALANINE A COMPLEX OF ALUMINUM TRIBROMIDE WITH BETA-PHENYLALANINE A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH TETRAMETHYL AMMONIUM CAMPHORSULFONATE A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH CAMPHORSULFONIC ACID A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH (-) BRUCINE A COMPLEX OF ETHYL ALUMINUM DICHLORIDE WITH (-) METHYL BUTYL BENZYLPHENYL AMMONIUM IODIDE, AND A COMPLEX OF BORON FLUORIDE ETHYL ETHERATE WITH (-) METHYL ETHYL ETHER.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |