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US4307151A Expired / Lapsed US ⏱️ 0.0 years remaining

Enzyme-active fibrous materials and method for preparing same

Assignee: Nitivy Co Ltd
•
Filing: 1979-08-09
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Granted: 1981-12-22
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Expires: 1999-08-09
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Abstract

Abstract A novel enzyme-active fibrous material is proposed comprising fibers of a partially aminoacetalized polyvinyl alcohol as the support and an enzyme adsorbed and bonded thereto such as glucose isomerase, invertase, urease and the like. The enzyme-active fibrous material of the invention is readily prepared by dipping fibers of the partially aminoacetalized polyvinyl alcohol in an aqueous solution of the desired enzyme. The enzymatic activity and the physical properties of the fibers are remarkably improved by the use of extra-fine fibers prepared with composite fibers of a partially aminoacetalized polyvinyl alcohol and a polyethyleneoxide subjected to selective leaching away of the latter component or by the use of so-called sheath-and-core type or side-by-side type composite fibers of which one of the components is a partially aminoacetalized polyvinyl alcohol. The enzyme-active fibrous materials of the invention can be used in various industrial processes utilizing enzymatic reactions very conveniently and with high efficiency.

Inventors

  • 👤 Aizo Yamauchi
  • 👤 Tetsuro Suehiro
  • 👤 Mitsuo Suzuki
  • 👤 Mitsutaka Uzumaki
  • 👤 Masahiko Takashio

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 12:42
CPC Classifications
D; D06; D06M; D06M16/00; D06M16/003; C; C12; C12N; C12N11/00; C12N11/02; C12N11/08; C12N11/082; C12N11/084; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/2933; Y10T428/2964; Y10T428/2967

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 40 words
An enzyme-active fibrous material which comprises a synthetic fiber of a partially aminoacetalized polyvinyl alcohol and an enzyme bonded thereto, the degree of aminoacetalization of the parially aminoacetalized polyvinyl alcohol being within the range from 0.5 to 10% by moles.
Claim 2
Dependent Claim 40 words
An enzyme-active fibrous material which comprises a synthetic fiber of a partially aminoacetalized polyvinyl alcohol and an enzyme bonded thereto, the degree of aminoacetalization of the parially aminoacetalized polyvinyl alcohol being within the range from 0.5 to 10% by moles.
Claim 3
Dependent Claim 37 words
An enzyme-active fibrous material which comprises a synthetic fiber of a partially aminoacetalized polyvinyl alcohol and an enzyme bonded thereto, said synthetic fiber having a fineness in the range of from 0.05 to 1 μm in diameter.
Claim 4
Dependent Claim 37 words
An enzyme-active fibrous material which comprises a synthetic fiber of a partially aminoacetalized polyvinyl alcohol and an enzyme bonded thereto, said synthetic fiber having a fineness in the range of from 0.05 to 1 μm in diameter.
Claim 5
Dependent Claim 38 words
An enzyme-active fibrous material which comprises a synthetic fiber of a partially aminoacetalized polyvinyl alcohol and an enzyme bonded thereto, said synthetic fiber being a composite filament composed of a partially aminoacetalized polyvinyl alcohol and a nonaminoacetalized polymer.
Claim 6
Dependent Claim 38 words
An enzyme-active fibrous material which comprises a synthetic fiber of a partially aminoacetalized polyvinyl alcohol and an enzyme bonded thereto, said synthetic fiber being a composite filament composed of a partially aminoacetalized polyvinyl alcohol and a nonaminoacetalized polymer.
Claim 7
Dependent Claim 18 words
The enzyme-active fibrous material as set forth in claim 3 wherein the non-aminoacetalized polymer is a polyvinyl alcohol.
Claim 8
Dependent Claim 18 words
The enzyme-active fibrous material as set forth in claim 3 wherein the composite filament has a sheath-and-core structure.
Claim 9
Dependent Claim 18 words
The enzyme-active fibrous material as set forth in claim 3 wherein the composite filament has a side-by-side structure.
Claim 10
Dependent Claim 30 words
A material according to any one of claims 1-6 wherein said enzyme is selected from the group consisting of glucose isomerases, invertases, ureases, glucoamylases, glucose oxidases, lipases, ribonucleases, and proteases.

References Cited (Backward Citations)

US3080207A Cited
US2906594A Cited
US3211685A Cited
US3084989A Cited
US3828542A Cited
US3741724A Cited
US3904478A Cited
JPS50145581A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-12-21 1985-06-22 1985-12-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-12-21 1989-06-22 1989-12-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-12-21 1993-06-22 1993-12-22 $7700.00 Window Closed / Lapsed

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