US3783101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enzymes bound to carriers having a metal oxide surface layer
Assignee: Corning Glass Works
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Filing: 1972-02-17
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Granted: 1974-01-01
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Expires: 1992-02-17
Abstract
Abstract THE HALF-LIFE OF ENZYMES WHICH HAVE BEEN IMMOBILIZED BY CHEMICAL COUPLING VIA SILANE COUPLING AGENTS TO INORGANIC CARRIERS IS INCREASED SIGNIFICANTLY BY USING A CARRIER WHICH HAS BEEN TREATED TO INCREASE ITS WATER-DURABILITY. TREATMENT OF THE CARRIER COMPRISES THE STEPS OF FIRST COATING THE CARRIER WITH A SOLUTION CONTAINING A METAL, THE OXIDE OF WHICH IS MORE WATER-DURABLE THAN THE CARRIER, AND THE FIRING THE COATED CARRIER TO FORM A CONTINUOUS METAL OXIDE LAYER ON THE CARRIER SURFACE. THE TREATED CARRIERS ARE THEN SILANIZED FOR CHEMICAL COUPLING WITH ENZYMES.
Inventors
- 👤 W Tomb
- 👤 H Weetall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
C; C12; C12N; C12N11/00; C12N11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |