Patent US3984358A successfully refreshed from Google Patents.
US3984358A
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US
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Granulated ion exchangers consisting of polystyrene exchangers with vinylidene fluoride copolymer or polythene-polyvinyl alcohol mixture as binder
Assignee: Individual
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Filing: 1974-02-28
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Granted: 1976-10-05
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Expires: 1994-02-28
Abstract
Abstract A composite material for the preparation of a granulated ion exchanger comprising A. 75.0 to 6.0 wt % of ionite, B. 5.0 to 0.0 wt % of pore former, C. 20.0 to 40.0 wt % of thermoplastics used as a binding agent, wherein A. is a ionite of any kind, B. is selected from a group of neutral salts soluble in water, C. is selected from a group consisting of polythene, polypropylene, fluorine copolymers and a mixture of polythene with polyvinyl alcohol.
Inventors
- 👤 Galina Zakharovna Nefedova
- 👤 Mark Alexandrovich Zhukov
- 👤 Arkady Borisovich Pashkov
- 👤 Elena Isaakovna Ljustgarten
- 👤 Larisa Dmitrievna Slabkaya
- 👤 Nadezhda Petrovna Vasilieva
- 👤 Gennady Grigorievich Arefev
- 👤 Eduard Konstantinovich Savitsky
- 👤 Ljudmila Ivanovna Kostjukhina
- 👤 Sofya Abramovna Ostrovskaya
- 👤 Valentina Grigorievna Belkovskaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:14
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/18; B; B01; B01J; B01J47/00; B01J47/018; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L25/02; C08L25/04; C08L25/06; C08L27/00; C08L27/02; C08L27/12; C08L27/20; C08L29/00; C08L29/02; C08L23/04; C08L23/06; C08L29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
An ion-exchanger of uniform granulometry obtained by extruding a mixture and then granulating the obtained extrudate, said mixture comprising, by weight, a ground mixture of 60 to 75% of polystyrene containing ion exchange groups, up to 5% of calcium chloride as a pore former and 20 to 40% of a binding agent selected from the group consisting of polythene and polyvinyl alcohol in a proportion of 10:1 by weight and a copolymer of hexafluorine propylene and vinylidene fluoride taken in a proportion of 6:1.
Claim 2
Dependent Claim
84 words
An ion-exchanger of uniform granulometry obtained by extruding a mixture and then granulating the obtained extrudate, said mixture comprising, by weight, a ground mixture of 60 to 75% of polystyrene containing ion exchange groups, up to 5% of calcium chloride as a pore former and 20 to 40% of a binding agent selected from the group consisting of polythene and polyvinyl alcohol in a proportion of 10:1 by weight and a copolymer of hexafluorine propylene and vinylidene fluoride taken in a proportion of 6:1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |