US2709781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for determining the electrical conductance of liquids
Assignee: Henkel Corp
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Filing: 1952-06-20
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Granted: 1955-05-31
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Expires: 1972-06-20
Abstract
No abstract record available.
Inventors
- 👤 Douty Alfred
- 👤 Smith Walter Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:17
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
AN INSTRUMENT FOR DETERMINING THE ELECTRICAL CONDUCTANCE OF LIQUIDS COMPRISING A RIGID CELL BODY CONSTRUCTED OF NON-CONDUCTING MATERIAL, SAID CELL BODY HAVING A PAIR OF CHAMBERS OF RELATIVELY LARGE CROSS-SECTION, AN ELECTRODE IN EACH CHAMBER, A PASSAGEWAY OF RESTRICTED CROSS-SECTION ESTABLISHING COMMUNICATION BETWEEN SAID CHAMBERS, AND A NORMALLY CLOSED ACCESS OPENING IN THE WALL OF THE CELL BODY IN ALIGNMENT WITH SAID RESTRICTED PASSAGEWAY THROUGH WHICH OPENING THE REPLACEABLE MEMBER CAN BE INSERTED OR WITHDRAWN WITHOUT DISTURBING THE SPATIAL RELATIONSHIP OF THE OTHER PARTS OF THE INSTRUMENT, THE MAJOR PORTION OF THE TOTAL RESISTANCE OF THE CELL BODY BEING WITHIN SAID RESTRICTED PASSAGEWAY AND SAID PASSAGEWAY BEING FORMED AS A PRESTANDARDIZED REPLACEABLE MEMBER ADAPTED TO PRODUCE, WHEN IN PLACE, A CELL OF PREDETERMINED CELL CONSTANT.
Claim 2
Dependent Claim
125 words
AN INSTRUMENT FOR DETERMINING THE ELECTRICAL CONDUCTANCE OF LIQUIDS COMPRISING A RIGID CELL BODY CONSTRUCTED OF NON-CONDUCTING MATERIAL, SAID CELL BODY HAVING A PAIR OF CHAMBERS OF RELATIVELY LARGE CROSS-SECTION, AN ELECTRODE IN EACH CHAMBER, A PASSAGEWAY OF RESTRICTED CROSS-SECTION ESTABLISHING COMMUNICATION BETWEEN SAID CHAMBERS, AND A NORMALLY CLOSED ACCESS OPENING IN THE WALL OF THE CELL BODY IN ALIGNMENT WITH SAID RESTRICTED PASSAGEWAY THROUGH WHICH OPENING THE REPLACEABLE MEMBER CAN BE INSERTED OR WITHDRAWN WITHOUT DISTURBING THE SPATIAL RELATIONSHIP OF THE OTHER PARTS OF THE INSTRUMENT, THE MAJOR PORTION OF THE TOTAL RESISTANCE OF THE CELL BODY BEING WITHIN SAID RESTRICTED PASSAGEWAY AND SAID PASSAGEWAY BEING FORMED AS A PRESTANDARDIZED REPLACEABLE MEMBER ADAPTED TO PRODUCE, WHEN IN PLACE, A CELL OF PREDETERMINED CELL CONSTANT.
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) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |