US3281345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing graft copolymers from polymers based upon vinyl chloride and elastomers
Assignee: Hoechst AG
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Filing: 1963-02-26
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Granted: 1966-10-25
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Expires: 1983-02-26
Abstract
No abstract record available.
Inventors
- 👤 Kuhne Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/02; C08F259/04; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A PROCESS FOR THE MANUFACTURE OF GRAFT COPOLYMERS FROM THERMOPLASTIC AND ELASTOMERIC POLYMERS, WHICH COMPRISES POLYMERIZING IN AN AQUEOUS EMULSION A MEMBER SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND MIXTURES OF VINYL CHLORIDE WITH AT LEAST ONE OTHER COMPATIBLE MONOMERIC VINYL COMPOUND, UNTIL 60 TO 85% OF THE MONOMER IS POLYMRIZED, MIXING THE LATEX SO OBTAINED AND CONTAINING UNREACTED VINYL CHLORIDE ALONG WITH THE POLYMER THOROUGHLY WITH A SECOND LATEX CONTAINING AS SOLE ESSENTIAL INGREDIENT AN ELASTOMERIC POLYMER SELECTED FROM THE GROUP CONSISTING OF THE POLYMERS OF DIENES AND COPOLYMERS FROM DIENES AND MONOMERIC VINYL COMPOUNDS WITH AT LEAST 75% OF DIENE COMPONENT, AND SUBJECTING THE MIXTURE OF THE TWO LATICES TO POLYMERIZING CONDITIONS UNTIL 90 TO 95% OF THE VINYL MONOMER PRESENT IS GRAFT POLYMERIZED ONTO THE ELASTOMERIC DIENE POLYMER.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |