US3359240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers containing phenylvinylene carbonate
Assignee: Dow Chemical Co
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Filing: 1963-01-14
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Granted: 1967-12-19
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Expires: 1983-01-14
Abstract
No abstract record available.
Inventors
- 👤 Dale J Hubbard
- 👤 Leo R Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:03
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A NORMALLY SOLID COPOLYMER PRODUCED BY COPOLYMERIZING A MIXTURE COMPRISING ESSENTIALLY PHENYLVINYLENE CARBONATE AND AT LEAST ONE MONOETHYLENICALLY UNSATURATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, STYRENE, O-CHLOROSTYRENE, A-METHYLSTYRENE, METHYL METHACRYLATE, METHYL VINYL KETONE AND VINYL ACETATE, SAID POLYMERIZATION BEING CARRIED OUT IN THE PRESENCE OF A FREE RADICAL CATALYST AT A PRESSURE CORRESPONDING SUBSTANTIALLY TO THE VAPOR PRESSURE OF THE REACTION MIXTURE.
Claim 2
Dependent Claim
64 words
A NORMALLY SOLID COPOLYMER PRODUCED BY COPOLYMERIZING A MIXTURE COMPRISING ESSENTIALLY PHENYLVINYLENE CARBONATE AND AT LEAST ONE MONOETHYLENICALLY UNSATURATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, STYRENE, O-CHLOROSTYRENE, A-METHYLSTYRENE, METHYL METHACRYLATE, METHYL VINYL KETONE AND VINYL ACETATE, SAID POLYMERIZATION BEING CARRIED OUT IN THE PRESENCE OF A FREE RADICAL CATALYST AT A PRESSURE CORRESPONDING SUBSTANTIALLY TO THE VAPOR PRESSURE OF THE REACTION MIXTURE.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |