US3265962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for microsample conductivity measurement
Assignee: Individual
•
Filing: 1965-06-04
•
Granted: 1966-08-09
•
Expires: 1985-06-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl L Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:30
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
THE METHOD OF MEASURING THE ELECTRICAL CONDUCTIVITY OF A VERY SMALL SAMPLE OF LIQUID, COMPRISING: GATHERING AND HOLDING SAID SAMPLE SOLELY BY MEANS OF CAPILLARY ATTRACTION; PASSING THROUGH THE SAMPLE AN ALTERNATING ELECTRICAL CURRENT HAVING A FREQUENCY OF FROM ABOUT FIVE THOUSAND CYCLES PER SECOND TO ABOUT ONE HUNDRED THOUSAND CYCLES PER SECOND; AND PROVIDING FROM THE EXTENT OF ELECTRICAL CURRENT THROUGH THE SAMPLE AN INDICATION WHICH IS A FUNCTION OF THE ELECTRICAL CONDUCTIVITY OF SAID LIQUID.
Claim 2
Independent Claim
77 words
THE METHOD OF MEASURING THE ELECTRICAL CONDUCTIVITY OF A VERY SMALL SAMPLE OF LIQUID, COMPRISING: GATHERING AND HOLDING SAID SAMPLE SOLELY BY MEANS OF CAPILLARY ATTRACTION; PASSING THROUGH THE SAMPLE AN ALTERNATING ELECTRICAL CURRENT HAVING A FREQUENCY OF FROM ABOUT FIVE THOUSAND CYCLES PER SECOND TO ABOUT ONE HUNDRED THOUSAND CYCLES PER SECOND; AND PROVIDING FROM THE EXTENT OF ELECTRICAL CURRENT THROUGH THE SAMPLE AN INDICATION WHICH IS A FUNCTION OF THE ELECTRICAL CONDUCTIVITY OF SAID LIQUID.
Claim 3
Dependent Claim
101 words
IN COMBINATION WITH A VERY SMALL SAMPLE OF A LIQUID, APPARATUS FOR HOLDING THE LIQUID SAMPLE AND MEASURING THE CONDUCTIVITY THEREOF, SAID APPARATUS COMPRISING: A SAMPLE COLLECTOR HAVING A SURFACE TO WHICH SAID LIQUID IS DRAWN AND RETAINED SOLELY BY CAPILLARY ATTRACTION; SPACED ELECTRODE SURFACES FORMING A PART OF SUCH COLLECTOR SURFACE; A SOURCE OF ALTERNATING ELECTROMOTIVE FORCE OF A FREQUENCY FROM ABOUT FIVE THOUSAND CYCLES PER SECOND TO ABOUT ONE HUNDRED THOUSAND CYCLES PER SECOND ELECTRICALLY CONNECTED WITH SAID ELECTRODE SURFACES; AND MEANS RESPONSIVE TO THE EXTENT OF CURRENT THROUGH SAID ELECTRODE SURFACES FOR INDICATING THE CONDUCTIVITY OF SAID LIQUID.
Claim 4
Dependent Claim
101 words
IN COMBINATION WITH A VERY SMALL SAMPLE OF A LIQUID, APPARATUS FOR HOLDING THE LIQUID SAMPLE AND MEASURING THE CONDUCTIVITY THEREOF, SAID APPARATUS COMPRISING: A SAMPLE COLLECTOR HAVING A SURFACE TO WHICH SAID LIQUID IS DRAWN AND RETAINED SOLELY BY CAPILLARY ATTRACTION; SPACED ELECTRODE SURFACES FORMING A PART OF SUCH COLLECTOR SURFACE; A SOURCE OF ALTERNATING ELECTROMOTIVE FORCE OF A FREQUENCY FROM ABOUT FIVE THOUSAND CYCLES PER SECOND TO ABOUT ONE HUNDRED THOUSAND CYCLES PER SECOND ELECTRICALLY CONNECTED WITH SAID ELECTRODE SURFACES; AND MEANS RESPONSIVE TO THE EXTENT OF CURRENT THROUGH SAID ELECTRODE SURFACES FOR INDICATING THE CONDUCTIVITY OF SAID LIQUID.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |