US3445369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic sensor with improved membrane support
Assignee: Beckman Coulter Inc
•
Filing: 1966-10-31
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Granted: 1969-05-20
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Joe A Porter
- 👤 Ronald F Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:12
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A CELL FOR POLAROGRAPHIC ANALYSIS OF A CONSTITUENT IN A SAMPLE COMPRISING: A BODY HAVING A RECESS IN ONE END THEREOF; A PAIR OF SPACED ELECTRODES POSITIONED IN SAID REESS AND ADAPTED TO BE JOINED BY AN ELETROLYTE IN SAID RECESS; A SUBSTANTIALLY FLAT MEMBRANE PERMEABLE TO SAID CONSTITUENT BUT IMPERMEABLE TO THE ELECTROLYTE; A PAIR OF FRICTIONALLY ENGAGED DISCS CLAMPING SAID MEMBRANE UNDER TENSION THEREBETWEEN IN A FLAT PLANE, SAID DISCS HAVING ALIGNED OPENINGS THEREIN IN ALIGNMENT WITH ONE OF SAID ELECTRODES; AND READILY RELEASABLE MEANS SECURING SAID PAIR OF DISCS TO SAID END OF SAID BODY IN SUCH A POSITION THAT THE PORTION OF SAID MEMBRANE WITHIN THE OPENINGS IN SAID DISCS BEARS AGAINST THE END OF SAID ONE OF SAID ELECTRODES.
Claim 2
Dependent Claim
124 words
A CELL FOR POLAROGRAPHIC ANALYSIS OF A CONSTITUENT IN A SAMPLE COMPRISING: A BODY HAVING A RECESS IN ONE END THEREOF; A PAIR OF SPACED ELECTRODES POSITIONED IN SAID REESS AND ADAPTED TO BE JOINED BY AN ELETROLYTE IN SAID RECESS; A SUBSTANTIALLY FLAT MEMBRANE PERMEABLE TO SAID CONSTITUENT BUT IMPERMEABLE TO THE ELECTROLYTE; A PAIR OF FRICTIONALLY ENGAGED DISCS CLAMPING SAID MEMBRANE UNDER TENSION THEREBETWEEN IN A FLAT PLANE, SAID DISCS HAVING ALIGNED OPENINGS THEREIN IN ALIGNMENT WITH ONE OF SAID ELECTRODES; AND READILY RELEASABLE MEANS SECURING SAID PAIR OF DISCS TO SAID END OF SAID BODY IN SUCH A POSITION THAT THE PORTION OF SAID MEMBRANE WITHIN THE OPENINGS IN SAID DISCS BEARS AGAINST THE END OF SAID ONE OF SAID ELECTRODES.
References Cited (Backward Citations)
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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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |