US3281377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous suspension polymerization containing graft polymers of polyalkylene glycol/vinyl compounds and derivatives thereof, as dispersants
Assignee: Hoechst AG
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Filing: 1961-03-08
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Granted: 1966-10-25
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Expires: 1981-03-08
Abstract
No abstract record available.
Inventors
- 👤 Lederer Michael
- 👤 Zimmermann Johann Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:59
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F285/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A PROCESS FOR POLYMERIZING A MEMBER SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND A MIXTURE OF VINYL CHLORIDE WITH 0.5 TO 50% BY WEIGHT, CALCULATED ON THE MIXTURE, OF ANOTHER MONOMER COPOLYMERIZABLE WITH VINYL CHLORIDE IN AQUEOUS SUSPENSION AND IN THE PRESENCE OF A FREE RADICAL-LIBERATING CATALYST AND A DISPERANT, THE IMPROVEMENT WHICH COMPRISES USING, AS A DISPERSANT 0.01% TO 2% BY WEIGHT OF MONOMER OF A MODIFIED POLYETHER GRAFT COPOLYER HAVING A POLYALKYLENE GLYCOL BACKBONE AND FROM 10% TO 50% BY WEIGHT OF A VINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, VINYL PROPIONATE, VINYL BUTYRATE, VINYL OCTOATE, ACRYLIC ESTERS AND METHACRYLIC ESTERS GRAFTED THEREON WHEREBY A POLYMERIC PRODUCT OF SAID VINYL CHLORIDE IN PARTICULATE FORM HAVING A POROUS STRUCTURE IS OBTAINED.
Claim 2
Dependent Claim
128 words
IN A PROCESS FOR POLYMERIZING A MEMBER SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND A MIXTURE OF VINYL CHLORIDE WITH 0.5 TO 50% BY WEIGHT, CALCULATED ON THE MIXTURE, OF ANOTHER MONOMER COPOLYMERIZABLE WITH VINYL CHLORIDE IN AQUEOUS SUSPENSION AND IN THE PRESENCE OF A FREE RADICAL-LIBERATING CATALYST AND A DISPERANT, THE IMPROVEMENT WHICH COMPRISES USING, AS A DISPERSANT 0.01% TO 2% BY WEIGHT OF MONOMER OF A MODIFIED POLYETHER GRAFT COPOLYER HAVING A POLYALKYLENE GLYCOL BACKBONE AND FROM 10% TO 50% BY WEIGHT OF A VINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, VINYL PROPIONATE, VINYL BUTYRATE, VINYL OCTOATE, ACRYLIC ESTERS AND METHACRYLIC ESTERS GRAFTED THEREON WHEREBY A POLYMERIC PRODUCT OF SAID VINYL CHLORIDE IN PARTICULATE FORM HAVING A POROUS STRUCTURE IS OBTAINED.
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 |