US3070579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl aromatic polymers having reactive end groups and process for making the same
Assignee: Dow Chemical Co
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Filing: 1958-09-15
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Granted: 1962-12-25
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Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 Michael M Szwarc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:49
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A POLYMERIC COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A HOMOPOLYMER OF A MONOMERIC MONOALKENYL AROMATIC HYDROCARBON CONTAINING A SINGLE BENZENE NUCLEUS HAVING A SINGLE ALIPHATIC SELECTED FROM THE GROUP CONSISTING OF THE VINYL RADICAL AND THE ISOPROPENYL RADICAL DIRECTLY ATTACHED TO A CARBON ATOM OF THE BENZENE NUCLEUS, WHICH POLYMER CONSISTS OF AT LEAST 10 CHEMICALLY COMBINED MONOMER UNITS IN A POLYMERIC CHAIN AND CONTAINS ON THE TERMINAL ATOMS OF THE POLYMER CHAIN, SUBSTITUENT RADICALS SELECTED FROM THE GROUP CONSISTING OF CARBOXYL RADICALS OF THE FORMULA-COOH DERIVED BY REACTION OF THE HOMOPOLYMER WITH CARBON DIOXIDE, CARBODITHIO RADICALS OF THE FORMULA-CSSH DERIVED BY REACTION OF THE HOMOPOLYMER WITH CARBON BISULFIDE, HYDROXY PROPYL RADICALS OF THE FORMULA-C3H6OH DERIVED BY REACTION OF THE HOMOPOLYMER WITH 1,2-PROPYLENE OXIDE, AND HYDROXY ETHYL RADICALS OF THE FORMULA-C2H4OH DERIVED BY REACTION OF THE HOMOPOLYMER WITH ETHYLENE OXIDE.
Claim 2
Dependent Claim
140 words
A POLYMERIC COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A HOMOPOLYMER OF A MONOMERIC MONOALKENYL AROMATIC HYDROCARBON CONTAINING A SINGLE BENZENE NUCLEUS HAVING A SINGLE ALIPHATIC SELECTED FROM THE GROUP CONSISTING OF THE VINYL RADICAL AND THE ISOPROPENYL RADICAL DIRECTLY ATTACHED TO A CARBON ATOM OF THE BENZENE NUCLEUS, WHICH POLYMER CONSISTS OF AT LEAST 10 CHEMICALLY COMBINED MONOMER UNITS IN A POLYMERIC CHAIN AND CONTAINS ON THE TERMINAL ATOMS OF THE POLYMER CHAIN, SUBSTITUENT RADICALS SELECTED FROM THE GROUP CONSISTING OF CARBOXYL RADICALS OF THE FORMULA-COOH DERIVED BY REACTION OF THE HOMOPOLYMER WITH CARBON DIOXIDE, CARBODITHIO RADICALS OF THE FORMULA-CSSH DERIVED BY REACTION OF THE HOMOPOLYMER WITH CARBON BISULFIDE, HYDROXY PROPYL RADICALS OF THE FORMULA-C3H6OH DERIVED BY REACTION OF THE HOMOPOLYMER WITH 1,2-PROPYLENE OXIDE, AND HYDROXY ETHYL RADICALS OF THE FORMULA-C2H4OH DERIVED BY REACTION OF THE HOMOPOLYMER WITH ETHYLENE OXIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |