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US3734897A Expired / Lapsed US ⏱️ 0.0 years remaining

Polymers containing silver and copper derived from cyano and sulfonic containing monomers

Assignee: Czech Academy of Sciences
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Filing: 1971-02-09
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Granted: 1973-05-22
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Expires: 1991-02-09
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Abstract

Abstract NEW POLYMERS AND COPOLYMERS CONTAINING SILVER AND/OR COPPER, USEFUL E.G. IN MANUFACTURING DIALYSE AND FILTRATION MEMBRANES, ION EXCHANGERS, LIGHT SENSITIVE LAYERS, CATALYSTS AND HYDROPHILIC COATINGS, ARE PREPARED FROM COPOLYMERS OR POLYMER MIXTURES CONTAINING BOTH NITRILE GROUPS AND STRONG ACIDIC GROUPS, BY RINGING THEM IN CONTACT WITH MONOVALENT SILVER OR COPPER IONS OR WITH THEIR MIXTURES. SILVER AND/OR COPPER ARE ATTACHED TO NITRILE GROUPS BY SIDE VALANCES, FORMING THUS COMPLEX COMPOUNDS. THE PROBABLE FORMULAE OF THE COMPLEX SIDEGROUPS ARE: -CN.AG+ OR PERHAPS -CN.AG+.NC- AND -CN.CU+ OR PERHAPS -CN.CU+.CU+.NC-, THE COMPLEX CATIONS FORMING POLYMERIC SALTS WIT STRONG ACIDIC GROUPS OF THE SAME OF AN ADJOINING MACROMOLECULE, TO WHICH ALL SAID NITRILE AND STRONGLY ACIDIC GROUPS ARE ATTACHED AS THEIR SIDE SUBSTITUENTS.

Inventors

  • 👤 A Stoy

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 13:14
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/14; B01D69/141; B01D69/148; B01D67/00; B01D67/0079; B01D67/00793; C; C02; C02F; C02F1/00; C02F1/50; C02F1/505; C08; C08F; C08F8/00; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C1/494; Y; Y10; Y10S; Y10S260/00; Y10S260/31

Claims Analysis

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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) 1976-05-21 1976-11-20 1977-05-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-05-21 1980-11-20 1981-05-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-05-21 1984-11-20 1985-05-22 $7700.00 Window Closed / Lapsed

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