Patent US2850640A successfully refreshed from Google Patents.
US2850640A
Expired / Lapsed
US
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Chlorine analyzer
Assignee: Dow Chemical Co
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Filing: 1954-05-17
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Granted: 1958-09-02
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Expires: 1974-05-17
Abstract
No abstract record available.
Inventors
- 👤 William G Dudley
- 👤 Bernard F Poetker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:44
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/18; G01N27/185
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
A THERMAL CONDUCTIVELY TYPE CHLORINE ANALYZE COMPRISING A BRIDGE CIRCUIT HAVING ARMS WHICH INCLUDE A REFERENCE GAS CELL CONTAINING CHLORINE, A MEASURING GAS CELL, GALVANIC MEAN CONNECTED ACROSS, PART OF SAID CIRCUIT FOR MEASURING POTENTIAL IMBALANCE THEREIN, POTENTIAL MEANS OF ENERGIZING SAID BRIDGE CIRCUIT, MEANS INCLUDING GAS FLOW AND PRESSURE CONTROL DEVICES FOR APPLYING A
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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |