US2735754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dravnieks
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
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Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:59
CPC Classifications
G; G01; G01N; G01N17/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
AN APPARATUS FOR USE IN CORROSION TESTING COMPRISING A TEST STRIP SAMPLE, A CARRIER FOR SAID TEST STRIP SAMPLE ADAPTED TO BE INTRODUCED INTO A FLOWING STREAM OF CORROSIVE FLUIDS, A CURRENT SOURCES APPLIED ACROSS SAID SAMPLE, A VARIABLE RESISTANCE IN SERIES WITH SAID CURRENT SOURCE AND SAID SAMPLE, A SECOND RESISTOR IN SERIES WITH SAID CURRENT SOURCE, SAID SAMPLE, AND SAID VARIABLE RESISTANCE, A RECORDING POTENTIOMETER ACROSS SAID SECOND RESISTANCE, A POTENTIAL-SENSING MEANS APPLIED ACROSS SAID SAMPLE, A CONTROL MEANS FOR ADJUSTING SAID VARIABLE RESISTANCE WHEREBY CURRENT PASSING THROUGH THE SAMPLE IS CONTROLLED, AND A CONTROL MEANS RESPONSIVE TO THE POTENTIAL-SENSING MEANS FOR AUTOMATICALLY AND SIMULTANEOUSLY REDUCING THE CURRENT FLOW THROUGH THE SAMPLE SO AS TO MAINTAIN A CONSTANT POTENTIAL DROP THEREACROSS, SAID RECORDING POTENTIONMETER MEASURING CHANGES IN THE CURRENT FLOW THROUGH THE CIRCUIT WHICH INDICATE THE EXTENT OF CORROSION OF THE SAMPLE.
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |