US3173016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measurement of mercury vapor
Assignee: Cordero Mining Co
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Filing: 1962-03-05
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Granted: 1965-03-09
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Williston
- 👤 Marion H Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:22
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/3103; Y; Y10; Y10S; Y10S55/00; Y10S55/34; Y10S73/00; Y10S73/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
APPARATUS FOR THE DETECTION OF SMALL CONCENTRATIONS OF MERCURY VAPOR IN A GAS COMPRISING A SOURCE OF ULTRAVIOLET LIGHT ABSORBABLE BY MERCURY VAPOR, A PAIR OF LIGHT CHAMBERS ALIGNED WITH SAID SOURCE AND PROVIDING APPROXIMATELY EQUAL LENGTH PATHS FOR ILLUMINATION FROM SAID SOURCE, A PAIR OF ELECTRICALLY PHOTOSENSITIVE ELEMENTS RESPONSIVE TO ULTRAVIOLET LIGHT FROM SAID SOURCE PASSING THROUGH THE RESPECTIVE CHAMBERS, A MEASURING CIRCUIT INCLUDING SAID ELEMENTS AND SUBSTANTIALLY SYMMETRICAL WITH RESPECT THERETO, SAID CIRCUIT INCLUDING MEANS RESPONSIVE TO UNBALANCE THEREOF AND, ACCORDINGLY, TO DIFFERENCES, IN ILLUMINATION OF SAID ELECTRICALY PHOTOSENSITIVE ELEMENTS, MEANS PROVIDING TWO GAS SAMPLES FROM THE SAME SOURCE TO SAID CHAMBERS, SAID PROVIDING MEANS INCLUDING MEANS FOR EXTRACTING MERCURY FROM ONLY ONE OF SAID SAMPLES, MEANS FOR PASSING THE LAST MENTIONED SAMPLE THROUGH ONE OF SAID CHAMBERS AFTER THE EXTRACTION OF MERCURY THEREFROM, AND MEANS FOR PASSING THE OTHER OF SAID SAMPLES THROUGH THE OTHER OF SAID CHAMBERS.
Claim 2
Dependent Claim
151 words
APPARATUS FOR THE DETECTION OF SMALL CONCENTRATIONS OF MERCURY VAPOR IN A GAS COMPRISING A SOURCE OF ULTRAVIOLET LIGHT ABSORBABLE BY MERCURY VAPOR, A PAIR OF LIGHT CHAMBERS ALIGNED WITH SAID SOURCE AND PROVIDING APPROXIMATELY EQUAL LENGTH PATHS FOR ILLUMINATION FROM SAID SOURCE, A PAIR OF ELECTRICALLY PHOTOSENSITIVE ELEMENTS RESPONSIVE TO ULTRAVIOLET LIGHT FROM SAID SOURCE PASSING THROUGH THE RESPECTIVE CHAMBERS, A MEASURING CIRCUIT INCLUDING SAID ELEMENTS AND SUBSTANTIALLY SYMMETRICAL WITH RESPECT THERETO, SAID CIRCUIT INCLUDING MEANS RESPONSIVE TO UNBALANCE THEREOF AND, ACCORDINGLY, TO DIFFERENCES, IN ILLUMINATION OF SAID ELECTRICALY PHOTOSENSITIVE ELEMENTS, MEANS PROVIDING TWO GAS SAMPLES FROM THE SAME SOURCE TO SAID CHAMBERS, SAID PROVIDING MEANS INCLUDING MEANS FOR EXTRACTING MERCURY FROM ONLY ONE OF SAID SAMPLES, MEANS FOR PASSING THE LAST MENTIONED SAMPLE THROUGH ONE OF SAID CHAMBERS AFTER THE EXTRACTION OF MERCURY THEREFROM, AND MEANS FOR PASSING THE OTHER OF SAID SAMPLES THROUGH THE OTHER OF SAID CHAMBERS.
References Cited (Backward Citations)
GB405937A
Cited
US2165214A
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US2411672A
Cited
US2395489A
Cited
US2459512A
Cited
US2765409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |