US5264105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enzyme electrodes
Assignee: Therasense Inc
•
Filing: 1993-03-17
•
Granted: 1993-11-23
•
Expires: 2013-03-17
Abstract
Abstract An improved enzyme electrode includes a three-dimensional redox polymer network having redox enzymes bound thereto, and also having a protein excluding polymeric coating.
Inventors
- 👤 Brian A. Gregg
- 👤 Adam Heller
- 👤 Wolfgang Kerner
- 👤 Michael V. Pishko
- 👤 Ioanis Katakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/001; C12Q1/002; Y; Y10; Y10S; Y10S435/00; Y10S435/817
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
An enzyme electrode comprising: an electrode having a testing surface; a transducing film covering the testing surface, which film comprises a cross-linked redox polymer network to which a redox enzyme is chemically bound, wherein the redox enzyme electrically communicates through the film with the electrode thereby transducing substrate flux to an electrical current; and a polymeric film covering the transducing film and excluding from the transducing film proteins of molecular weights exceeding 5000 daltons.
Claim 2
Dependent Claim
74 words
An enzyme electrode comprising: an electrode having a testing surface; a transducing film covering the testing surface, which film comprises a cross-linked redox polymer network to which a redox enzyme is chemically bound, wherein the redox enzyme electrically communicates through the film with the electrode thereby transducing substrate flux to an electrical current; and a polymeric film covering the transducing film and excluding from the transducing film proteins of molecular weights exceeding 5000 daltons.
Claim 3
Dependent Claim
12 words
The enzyme electrode of claim 1, wherein the polymeric film is polyurethane.
Claim 4
Dependent Claim
14 words
The enzyme electrode of claim 2, wherein the polymeric film further includes palmitic acid.
Claim 5
Dependent Claim
12 words
The enzyme electrode of claim 1, wherein the polymeric film is polycarbonate.
Claim 6
Dependent Claim
20 words
The enzyme electrode of claim 1, wherein the polymeric film includes multiple anionic functions covalently bound to the polymeric film.
Claim 7
Dependent Claim
24 words
The enzyme electrode of claim 5, wherein the polymeric film includes multiple carboxylate, sulfonate, phosphate, or phosphonate functions covalently bound to the polymeric film.
Claim 8
Dependent Claim
12 words
The enzyme electrode of claim 6, wherein the polymeric film contains fluorine.
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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) | 1996-11-22 | 1997-05-24 | 1997-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-22 | 2001-05-24 | 2001-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-22 | 2005-05-24 | 2005-11-23 | $7700.00 | Window Closed / Lapsed |