US3743588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion-specific membrane
Assignee: DS MEDICAL PRODUCTS Co A CORP
•
Filing: 1971-10-18
•
Granted: 1973-07-03
•
Expires: 1991-10-18
Abstract
Abstract AN ION-SPECIFIC MEMBRANE INCLUDES A HYDROPHOBIC ELASTOMERIC POLYMER WITH A DIELECTRIC CONSTANT OF 4 TO 13, AND AN ION-SPECIFIC CARRIER. THE HYDROPHOBIC ELASTOMERIC POLYMER IS PREFERABLY AN ORGANOPOLYSILOXANE POLYCARBONATE BLOCK COPOLYMER. THE ION-SPECIFIC CARRIERS INCLUDE H+ AND K+ ION CARRIERS.
Inventors
- 👤 Blanc O Le
- 👤 J Brown
- 👤 G Slusarczuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:38
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335; C; C08; C08G; C08G64/00; C08G64/18; C08G64/186; C08K; C08K5/00; C08K5/16; C08K5/315; C08K5/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |