US3767553A
Expired / Lapsed
US
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Potassium ion-specific membrane
Assignee: DS MEDICAL PRODUCTS Co A CORP
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Filing: 1971-10-18
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Granted: 1973-10-23
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Expires: 1991-10-18
Abstract
Abstract A potassium ion-specific membrane includes a hydrophobic elastomeric polymer with a dielectric constant of from 4 to 13, and a potassium ion-specific carrier. The hydrophobic elastomeric polymer is preferably an organopolysiloxane polycarbonate block copolymer. The potassium ion-specific carrier is selected from the group consisting of nonactin, gramicidins, valinomycin, and mixtures thereof.
Inventors
- 👤 J Brown
- 👤 Blanc O Le
- 👤 W Grubb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:34
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18; C08G64/186; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08L; C08L83/00; C08L83/10; G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335; G01N2410/00; G01N2410/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
A potassium ion-specific membrane as in claim 1, in which the copolymer is a carbamate-linked cyanoethylmethyl siloxane/bisphenol-A carbonate copolymer.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |