Patent US3850751A successfully refreshed from Google Patents.
US3850751A
Expired / Lapsed
US
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Enzymes immobilized on porous inorganic support materials
Assignee: Corning Glass Works
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Filing: 1973-02-16
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Granted: 1974-11-26
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Expires: 1993-02-16
Abstract
Abstract An immobilized enzyme composite is disclosed having an enzyme adsorbed to the inner surface of a porous ceramic body consisting of agglomerated metal oxide particles having an average pore diameter of at least as large as the largest dimension of the enzyme but less than 1,000*A.
Inventors
- 👤 R Messing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:27
CPC Classifications
C; C12; C12N; C12N11/00; C12N11/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
AN IMMOBILIZED ENZYME COMPOSITE COMPRISING AN ENZYME ADSORBED TO THE INNER SURFACE OF A POROUS, ESSENTIALLY NON-SILICEOUS CERAMIC BODY HAVING AVERAGE PORE DIAMETER AT LEAST AS LARGE AS THE LARGEST DIMENSION OF THE ENZYME AND BETWEEN ABOUT 100A AND 500A, THE POROUS CERAMIC BODY CONSISTING OF AGGLOMERATED METAL OXIDE PARTICLES SELECTED FROM THE GROUP CONSISTING OF ALUMINA, TITANIA, AND ZIRCONIA AND MIXTURES THEREOF AND THE POROUS CERAMIC BODY BEING A PARTICLE HAVING A PARTICLE SIZE BETWEEN ABOUT 4 AND ABOUT 200 MESH. U.S. STANDARD SIEVE.
Claim 2
Dependent Claim
85 words
AN IMMOBILIZED ENZYME COMPOSITE COMPRISING AN ENZYME ADSORBED TO THE INNER SURFACE OF A POROUS, ESSENTIALLY NON-SILICEOUS CERAMIC BODY HAVING AVERAGE PORE DIAMETER AT LEAST AS LARGE AS THE LARGEST DIMENSION OF THE ENZYME AND BETWEEN ABOUT 100A AND 500A, THE POROUS CERAMIC BODY CONSISTING OF AGGLOMERATED METAL OXIDE PARTICLES SELECTED FROM THE GROUP CONSISTING OF ALUMINA, TITANIA, AND ZIRCONIA AND MIXTURES THEREOF AND THE POROUS CERAMIC BODY BEING A PARTICLE HAVING A PARTICLE SIZE BETWEEN ABOUT 4 AND ABOUT 200 MESH. U.S. STANDARD SIEVE.
Claim 3
Dependent Claim
17 words
The composite of claim 1 wherein the ceramic body has a surface area greater than 5 m2/g.
Claim 4
Dependent Claim
24 words
The composite of claim 2 wherein the average particle size of the ceramic body is between about 25 and 80 mesh, U.S. Standard Sieve.
Claim 5
Dependent Claim
27 words
The composite of claim 3 wherein the enzyme is glucose isomerase and the ceramic body comprises porous alumina having an average pore diameter between 140A and 220A.
Claim 6
Dependent Claim
26 words
The composite of claim 3 wherein the enzyme is papain and the ceramic body comprises porous titania having an average pore diameter between 220A and 400A.
Claim 7
Dependent Claim
28 words
The composite of claim 3 wherein the enzyme is an alkaline protease and the ceramic body comprises porous titania having an average pore diameter between 220A and 400A.
Claim 8
Dependent Claim
27 words
The composite of claim 3 wherein the enzyme is glucose isomerase and the ceramic body comprises porous zirconia having an average pore diameter between 140A and 200A.
Claim 9
Dependent Claim
24 words
The composite of claim 3 wherein the enzyme is urease and the ceramic body comprises porous titania having an average pore diameter about 420A.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |