US3844719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercury metal analyzer
Assignee: PPG Industries Inc
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Filing: 1972-06-01
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Granted: 1974-10-29
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Expires: 1992-06-01
Abstract
Abstract An apparatus for determining the amount of mercury in a liquid or gas sample is provided comprising means for sequentially oxidizing and reducing a non-organic fluid containing mercury combined with organic molecules to form mercury metal and means for passing an inert gas to carry said mercury metal to a UV spectrophotometer wherein the amount of mercury is recorded.
Inventors
- 👤 D Hammitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:26
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/005; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0036; G01N33/0045
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
100 words
A MERCURY-METAL ANALYZER COMPRISING: A. A REACTOR INCLUDING REACTOR VENT MEANS; B. A SAMPLE FEED MEANS TO SAID REACTOR; C. A REDUCING AGENT FEED MEANS TO SAID REACTOR; D. A SEPARATE OXIDIZING AGENT FEED MEANS TO SAID REACTOR; E. A SEPARATE ELEVATED PRESSURE GAS FEED MEANS TO SAID REACTOR; F. A MEANS FOR MAINTAINING SAID GAS FEED MEANS AT AN ELEVATED PRESSURE WITH RESPECT TO AMBIENT PRESSURE; G. AN U.V. SPECTROPHOTOMETER MEANS IN SERIES WITH SAID REACTOR FOR MEASURING THE ABSORBANCE OF MECURY-METAL IN THE PRODUCT OF SAID REACTOR; AND H. AN ELECTRIC CYCLE CONTROL MEANS FOR SEQUENTIALLY AND REPETITIVELY:
Claim 2
Dependent Claim
100 words
A MERCURY-METAL ANALYZER COMPRISING: A. A REACTOR INCLUDING REACTOR VENT MEANS; B. A SAMPLE FEED MEANS TO SAID REACTOR; C. A REDUCING AGENT FEED MEANS TO SAID REACTOR; D. A SEPARATE OXIDIZING AGENT FEED MEANS TO SAID REACTOR; E. A SEPARATE ELEVATED PRESSURE GAS FEED MEANS TO SAID REACTOR; F. A MEANS FOR MAINTAINING SAID GAS FEED MEANS AT AN ELEVATED PRESSURE WITH RESPECT TO AMBIENT PRESSURE; G. AN U.V. SPECTROPHOTOMETER MEANS IN SERIES WITH SAID REACTOR FOR MEASURING THE ABSORBANCE OF MECURY-METAL IN THE PRODUCT OF SAID REACTOR; AND H. AN ELECTRIC CYCLE CONTROL MEANS FOR SEQUENTIALLY AND REPETITIVELY:
Claim 3
Dependent Claim
15 words
SIMULTANEOUSLY FEEDING SAMPLE TO THE REACTOR FROM THE SAMPLE FEED MEANS AND VENTING THE REACTOR;
Claim 4
Dependent Claim
15 words
SIMULTANEOUSLY FEEDING SAMPLE TO THE REACTOR FROM THE SAMPLE FEED MEANS AND VENTING THE REACTOR;
Claim 5
Dependent Claim
12 words
FEEDING OXIDIZING AGENT TO THE REACTOR FROM THE OXIDIZING AGENT FEED MEANS;
Claim 6
Dependent Claim
12 words
FEEDING OXIDIZING AGENT TO THE REACTOR FROM THE OXIDIZING AGENT FEED MEANS;
Claim 7
Dependent Claim
48 words
The mercury-metal analyzer of claim 1 wherein the electric cycle control means comprises means for first passing air through the U.V. spectrophotometer means whereby to set the spectrophotometer means to a zero reading of mercury, and thereafter feeding the reaction product from the reactor to the spectrophotometer means.
Claim 8
Dependent Claim
12 words
feeding oxidizing agent to the reactor from the oxidizing agent feed means;
Claim 9
Dependent Claim
12 words
feeding oxidizing agent to the reactor from the oxidizing agent feed means;
Claim 10
Dependent Claim
8 words
sealing the reactor during oxidation of the sample;
Claim 11
Dependent Claim
8 words
sealing the reactor during oxidation of the sample;
Claim 12
Dependent Claim
8 words
SEALING THE REACTOR DURING OXIDIATION OF THE SAMPLE
Claim 13
Dependent Claim
8 words
SEALING THE REACTOR DURING OXIDIATION OF THE SAMPLE
Claim 14
Dependent Claim
8 words
venting the reactor after oxidation of the sample;
Claim 15
Dependent Claim
8 words
venting the reactor after oxidation of the sample;
Claim 16
Dependent Claim
8 words
VENTING THE REACTOR AFTER OXIDIATION OF THE SAMPLE;
Claim 17
Dependent Claim
8 words
VENTING THE REACTOR AFTER OXIDIATION OF THE SAMPLE;
Claim 18
Dependent Claim
12 words
FEEDING REDUCING AGENT TO THE REACTOR FROM THE REDUCING AGENT FEED MEANS;
Claim 19
Dependent Claim
12 words
FEEDING REDUCING AGENT TO THE REACTOR FROM THE REDUCING AGENT FEED MEANS;
Claim 20
Dependent Claim
12 words
feeding reducing agent to the reactor from the reducing agent feed means;
Claim 21
Dependent Claim
12 words
feeding reducing agent to the reactor from the reducing agent feed means;
Claim 22
Dependent Claim
23 words
thereafter feeding the reaction product from the reactor to the U.V. spectrophotometer means by gas from the elevated pressure gas feed means; and
Claim 23
Dependent Claim
23 words
thereafter feeding the reaction product from the reactor to the U.V. spectrophotometer means by gas from the elevated pressure gas feed means; and
Claim 24
Dependent Claim
23 words
THEREAFTER FEEDING THE REACTION PRODUCT FRON THE REACTOR TO THE U.V. SPECTROPHOTOMETER MEANS BY GAS FROM THE ELEVATED PRESSURE GAS FEED MEANS; AND
Claim 25
Dependent Claim
23 words
THEREAFTER FEEDING THE REACTION PRODUCT FRON THE REACTOR TO THE U.V. SPECTROPHOTOMETER MEANS BY GAS FROM THE ELEVATED PRESSURE GAS FEED MEANS; AND
Claim 26
Dependent Claim
12 words
purging the reactor with gas from the elevated pressure gas feed means.
Claim 27
Dependent Claim
12 words
purging the reactor with gas from the elevated pressure gas feed means.
Claim 28
Dependent Claim
12 words
PURGING THE REACTOR WITH GAS FROM THE ELEVATED PRESSURE GAS FEED MEANS.
Claim 29
Dependent Claim
12 words
PURGING THE REACTOR WITH GAS FROM THE ELEVATED PRESSURE GAS FEED MEANS.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |