US4375399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecule selective sensor for industrial use and procedure for its preparation
Assignee: Radelkis Elektrokemai
•
Filing: 1980-12-19
•
Granted: 1983-03-01
•
Expires: 2000-12-19
Abstract
Abstract A molecule selective sensor having two permeable membranes in contacting relationship with each other, one membrane being a protein membrane found in nature, as for example, hog intestine membrane, air bladder of fish, epidermal section of mammals and reptiles, etc. and the other membrane being the reaction product of acrylamide, polyvinylalcohol, an enzyme, bovine albumin and glutaric aldehyde.
Inventors
- 👤 Jeno Havas
- 👤 Geza Nagy
- 👤 Emma Porjesz
- 👤 Erno Pungor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:42
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/001; Y; Y10; Y10S; Y10S435/00; Y10S435/817
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
A process for producing an enzymatically active membrane which consists in mixing together 1-20 weight percent of acrylamide, 1-20 weight percent of polyvinylalcohol, 0.01-10 weight percent of bovine albumin, 0.0001-5 weight percent of an enzyme, 0.1-5 weight percent of glutaric aldehyde, a polymerization initiating amount of potassium persulfate and the remainder to 100 weight percent of distilled water, spreading the mixture on a protein membrane found in nature to form a thin sheet and allowing the mixture to react for 12 hours at room temperature.
Claim 2
Dependent Claim
85 words
A process for producing an enzymatically active membrane which consists in mixing together 1-20 weight percent of acrylamide, 1-20 weight percent of polyvinylalcohol, 0.01-10 weight percent of bovine albumin, 0.0001-5 weight percent of an enzyme, 0.1-5 weight percent of glutaric aldehyde, a polymerization initiating amount of potassium persulfate and the remainder to 100 weight percent of distilled water, spreading the mixture on a protein membrane found in nature to form a thin sheet and allowing the mixture to react for 12 hours at room temperature.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 wherein the mixture contains in addition 0.1-5 weight percent of N,N'-methylene-bis-acrylamide.
Claim 4
Dependent Claim
53 words
A hollow molecule-selective sensor having a sensing electrode and a reference electrode and two permeable membranes in contacting relationship with each other, one of said membranes being a protein membrane found in nature and the other of said membranes being a self-supporting enzymatically active membrane prepared according to the process of claim 1.
Claim 5
Dependent Claim
42 words
A sensor as claimed in claim 3 wherein the said protein membrane found in nature is selected from the group consisting of hog intestine membrane, air bladder of fish, epidermal section of a mammal, epidermal section of a reptile and corneal section.
Claim 6
Dependent Claim
17 words
A sensor as claimed in 3 wherein the self-supporting enzymatically active membrane comprises two or more enzymes.
References Cited (Backward Citations)
US3539455A
Cited
US3843446A
Cited
US3896008A
Cited
US4066512A
Cited
US4020830A
Cited
US4020830B1
Cited
US4092219A
Cited
JPS5247983A
Cited
US4069106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |