US4233136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid membrane electrode
Assignee: BankBoston NA
•
Filing: 1978-07-17
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Granted: 1980-11-11
•
Expires: 1998-07-17
Abstract
Abstract An electrode assembly comprising an organic plastic sample flow-through tube, a portion of the wall of which comprises a membrane, the membrane comprising a matrix of an organic plastic material containing a non-volatile solvent-plasticizer and an ion exchange material dissolved in the solvent plasticizer, the membrane chemically bonded to and integral with said tube. The method of forming the membrane to the tube comprises dissolving the matrix material, the ion exchange material and the non-volatile plasticizer in a volatile solvent, placing the resulting solution on a surface and evaporating the volatile solvent to form the membrane, contacting an edge of the tube to the membrane material, contacting the tube edge with said volatile solvent and allowing the solvent to evaporate.
Inventors
- 👤 Frederick F. Spaziani
- 👤 James E. Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:09
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
126 words
A flow-through electrode assembly comprising a tube or organic plastic material having a cylindrical tube wall defining therewith a cylindrical liquid sample flow path through said electrode, characterized in that said plastic material of said tube is interrupted and a membrane defines said cylindrical tube wall at said interruption of said plastic material, said membrane comprising a matrix of an organic plastic material containing a non-volatile solvent plasticizer and an ion exchange material dissolved in said solvent plasticizer, further characterized in that said membrane is chemically bonded to and integral with the remainder of said tube wall and further characterized in that the interior of said tube wall, including said membrane portion, comprises a smooth, continuous, cylindrical surface defining a flow path for said liquid sample.
Claim 2
Dependent Claim
126 words
A flow-through electrode assembly comprising a tube or organic plastic material having a cylindrical tube wall defining therewith a cylindrical liquid sample flow path through said electrode, characterized in that said plastic material of said tube is interrupted and a membrane defines said cylindrical tube wall at said interruption of said plastic material, said membrane comprising a matrix of an organic plastic material containing a non-volatile solvent plasticizer and an ion exchange material dissolved in said solvent plasticizer, further characterized in that said membrane is chemically bonded to and integral with the remainder of said tube wall and further characterized in that the interior of said tube wall, including said membrane portion, comprises a smooth, continuous, cylindrical surface defining a flow path for said liquid sample.
Claim 3
Dependent Claim
35 words
The electrode assembly claimed in claim 1 further characterized in that said tube is linear and the interior of said tube wall, including said membrane portion, defines a linear flow path for said liquid sample.
Claim 4
Dependent Claim
27 words
The electrode assembly claimed in claim 2 further characterized in that said tube and the components of said membrane are all soluble in a common volatile solvent.
Claim 5
Dependent Claim
23 words
The electrode assembly claimed in claim 3 further characterized in that said matrix material comprises from about 8-26% by weight of said membrane.
Claim 6
Dependent Claim
23 words
The electrode assembly claimed in claim 4 further characterized in that said matrix material comprises from about 12-20% by weight of said membrane.
Claim 7
Dependent Claim
25 words
The electrode assembly claimed in either of claims 3 or 4 further charcterized in that said organic plastic material of said matrix material comprises polyvinylchloride.
Claim 8
Dependent Claim
15 words
The electrode assembly claimed in claim 6 further characterized in that said plasticizer comprises 2-nitro-p-cymene.
Claim 9
Dependent Claim
17 words
The electrode assembly claimed in claim 8 further characterized in that said ion exchange material comprises valinomycin.
Claim 10
Dependent Claim
25 words
The electrode assembly claimed in claim 8 further characterized in that said membrane has a thickness in the range of from 8 to 12 mils.
Claim 11
Dependent Claim
22 words
The electrode assembly claimed in claim 9 in which said membrane extends across an opening formed on one side of said tube.
Claim 12
Dependent Claim
55 words
The electrode assembly claimed in claim 10 further characterized in comprising a housing having a chamber therein, an agar gel of an aqueous solution of kCl saturated with AgCl in said chamber, a reference electrode in contact with said solution and said tube extends through said housing with said membrane in contact with said solution.
Claim 13
Dependent Claim
19 words
The electrode assembly claimed in claim 6 further characterized in that said remainder of said tube wall is polyvinylchloride.
Claim 14
Dependent Claim
129 words
A flow-through electrode assembly comprising a tube of organic plastic material having a tube wall defining therewith a tubular liquid sample flow path through said electrode, characterized in that said plastic material of said tube is interrupted and a membrane defines said tube wall at said interruption of said plastic material, said membrane comprising a matrix of an organic plastic material containing a non-volatile solvent plasticizer and an ion exchange material dissolved in said solvent plasticizer, further characterized in that said membrane is chemically bonded to and integral with the remainder of said tube wall, and further characterized in that the interior of said tube wall including said membrane portion comprises a smooth, continuous surface of uniform cross-sectional configuration and dimensions defining a flow path for said liquid sample.
Claim 15
Dependent Claim
129 words
A flow-through electrode assembly comprising a tube of organic plastic material having a tube wall defining therewith a tubular liquid sample flow path through said electrode, characterized in that said plastic material of said tube is interrupted and a membrane defines said tube wall at said interruption of said plastic material, said membrane comprising a matrix of an organic plastic material containing a non-volatile solvent plasticizer and an ion exchange material dissolved in said solvent plasticizer, further characterized in that said membrane is chemically bonded to and integral with the remainder of said tube wall, and further characterized in that the interior of said tube wall including said membrane portion comprises a smooth, continuous surface of uniform cross-sectional configuration and dimensions defining a flow path for said liquid sample.
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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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |