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US3676303A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for determining endohydrolases capable of breaking down polysaccharides and reagents for carrying out the method

Assignee: Pfizer Health AB
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Filing: 1969-01-14
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Granted: 1972-07-11
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Expires: 1989-01-14
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Abstract

Abstract A METHOD FOR DETERMINING ENDOHYDROLASE WHICH BREAKS DOWN POLYSACHARIDE IN AN AQUIOUS SAMPLE WHICH COMPRISES CONTACTING THE SAMPLE WITH A REAGENT CONSISTING OF A WATER-INSOLUBLE BUT HYDROPHILIC, SWELLABLE, ENZYMATICALLY HYDROLYZABLE THREE-DIMENSIONAL NETWORK OF MOLECULES OF EITHER A POLSACCHARIDE OR AN ENZYMATICALLY HYDROLYZABLE DERIVATIVE OF A POLYSACCHARIDE. THE MOLECULES ARE CROSSLINKED WITH BONDS OF A COVALENT NATURE. ALSO THE THREE-DIMENSIONAL NETWORK PRESENTS INDICATABLE SUBSTITUENTS BOUND BY MEANS OF BONDS OF A COVALENT CHARACTER. THE CONTACTING CAUSES A REACTION TO TAKE PLACE BETWEEN THE ENZYME AND THE REAGENT WHEREBY WATER-SOLUBLE FRAGMENTS OF THE REAGENT CONTAINING INDICATABLE SUBSTITUENTS ARE RELEASED. THE UNDISSOLVED REAGENT IS SEPARATED FROM THE LIQUID WITH THE WATER-SOLUBLE FRAGMENTS OF THE REAGENT DISSOLVED THEREIN, AFTER THE ENZYME HAS ACTED UPON THE REAGENT FOR A DETERMINED PERIOD OF TIME. THE INDICATABLE SUBSTITUENTS ARE THEN DETERMINED IN AT LEAST ONE OF THE TWO PHASES CONSISTING OF THE LIQUID PHASE AND THE UNDISSOLVED REAGENT MATERIAL PHASE AS A MEASURE OF THE ENZYME ACTIVITY. ALSO, THE REAGENT FOR DETERMINING ENDOHYDROLASE IN PROVIDED.

Inventors

  • 👤 Bjorn G-A Ingelman
  • 👤 Miroslav Ceska

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 22:14
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/003; C12; C12Q; C12Q1/00; C12Q1/34; G; G01; G01N; G01N2333/00; G01N2333/90; G01N2333/914; G01N2333/924

Claims Analysis

Total Claims: 0
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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) 1975-07-11 1976-01-10 1976-07-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-07-11 1980-01-10 1980-07-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-07-11 1984-01-10 1984-07-11 $7700.00 Window Closed / Lapsed

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