US3847552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Environmental monitoring device and method
Assignee: International Business Machines Corp
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Filing: 1973-11-23
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Granted: 1974-11-12
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Expires: 1993-11-23
Abstract
Abstract A method of simultaneously measuring the quantitative presence of a plurality of atmospheric pollutants and apparatus for performing the measurement is disclosed. Specific dry reagents which react with particular pollutants to be measured are exposed in a staged array according to their reactivity to a known volume of ambient air at a location to be measured. The reaction products are later analyzed to obtain a quantitative measure of the pollutants present in the sample.
Inventors
- 👤 L Hobgood
- 👤 J Lorenzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:55
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0011; G01N33/0013; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/182; Y10T436/184; Y10T436/21; Y10T436/218
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A METHOD OF SIMULTANEOUSLY MEASURING THE QUANTITATIVE PRESENCE OF A PLURALITY OF GASEOUS ATMOSPHERIC POLLUTANTS, COMPRISING STEPS OF: DEPOSITING SPECIFIC DRY REAGENTS INDIVIDUALLY ON SEPARATE AIR PERMEABLE SUBSTRATES FOR EACH OF SAID GASEOUS POLLUTANTS WHOSE PRESENCE IS TO BE MEASURED; SEALING SAID SUBSTRATES IN AN AIR TIGHT PACKAGE AND ARRANGED IN A STACK FROM TOP TO BOTTOM IN AN ORDER IN WHICH NO REAGENT SUBSTRATE SENSITIVE TO MORE THAN ONE SPECIFIC POLLUTANT IS PLACED HIGHER IN THE STACK THAN ANY SUBSTRATE WHICH CARRIES A SPECIFIC REAGENT FOR ANY OF THE POLLUTANTS TO WHICH SAID REAGENT ON SAID HIGHER SUBSTRATE IS REACTIVE; OPENING SAID PACKAGE AT A LOCAION WHOSE DEGREE OF POLLUTION FROM SAID PLURAITY OF GASEOUS POLLUTANTS IS TO BE MEASURED AND PASSING A KNOWN VOLUME OF AMBIENT ATOMSPHERE THROUGH SAID SUBSTRATES FROM TOP TO BOTTOM; RESEALING SAID PACKAGE TO PREVENT FURTHER REACTION BETWEEN THE STMISPHERE AND SAID REAGENTS UNTIL THE REACTIVE PRODUCTS ARE ANALYZED; OPENING AND ANALYZING THE REACTIVE PRODUCTS PRESENT ON SAID
Claim 2
Independent Claim
164 words
A METHOD OF SIMULTANEOUSLY MEASURING THE QUANTITATIVE PRESENCE OF A PLURALITY OF GASEOUS ATMOSPHERIC POLLUTANTS, COMPRISING STEPS OF: DEPOSITING SPECIFIC DRY REAGENTS INDIVIDUALLY ON SEPARATE AIR PERMEABLE SUBSTRATES FOR EACH OF SAID GASEOUS POLLUTANTS WHOSE PRESENCE IS TO BE MEASURED; SEALING SAID SUBSTRATES IN AN AIR TIGHT PACKAGE AND ARRANGED IN A STACK FROM TOP TO BOTTOM IN AN ORDER IN WHICH NO REAGENT SUBSTRATE SENSITIVE TO MORE THAN ONE SPECIFIC POLLUTANT IS PLACED HIGHER IN THE STACK THAN ANY SUBSTRATE WHICH CARRIES A SPECIFIC REAGENT FOR ANY OF THE POLLUTANTS TO WHICH SAID REAGENT ON SAID HIGHER SUBSTRATE IS REACTIVE; OPENING SAID PACKAGE AT A LOCAION WHOSE DEGREE OF POLLUTION FROM SAID PLURAITY OF GASEOUS POLLUTANTS IS TO BE MEASURED AND PASSING A KNOWN VOLUME OF AMBIENT ATOMSPHERE THROUGH SAID SUBSTRATES FROM TOP TO BOTTOM; RESEALING SAID PACKAGE TO PREVENT FURTHER REACTION BETWEEN THE STMISPHERE AND SAID REAGENTS UNTIL THE REACTIVE PRODUCTS ARE ANALYZED; OPENING AND ANALYZING THE REACTIVE PRODUCTS PRESENT ON SAID
Claim 3
Dependent Claim
86 words
The method as described in claim 1, wherein: said depositing step is carried out under conditions in which the ambient amount of each of said pollutants is known; said opening and analyzing of said substrates is conducted under conditions where the ambient amount of each of said pollutants to be measured is known; and said dry reagents deposited in said depositing step are deposited in an excess amount over that expected to be required for the general range of concentrations of said pollutants to be measured.
Claim 4
Dependent Claim
101 words
Apparatus for simultaneously measuring the quantitative presence of a plurality of gaseous atmospheric pollutants, comprising a plurality of specific dry reagent materials individually deposited on separate air permeable carrying means; holding means for holding said plurality of carrier means, said holding means being a sealable airtight package for maintaining said carriers in position in an ordered stack from top to bottom, in which said order is arranged so that each said reagent which is reactive with more than one said pollutant is placed lower in the stack than any other said reagent which is reactive with fewer of said same pollutants.
Claim 5
Dependent Claim
101 words
Apparatus for simultaneously measuring the quantitative presence of a plurality of gaseous atmospheric pollutants, comprising a plurality of specific dry reagent materials individually deposited on separate air permeable carrying means; holding means for holding said plurality of carrier means, said holding means being a sealable airtight package for maintaining said carriers in position in an ordered stack from top to bottom, in which said order is arranged so that each said reagent which is reactive with more than one said pollutant is placed lower in the stack than any other said reagent which is reactive with fewer of said same pollutants.
Claim 6
Dependent Claim
36 words
Apparatus as described in claim 3, further comprising: a particle entrapping filter means for entrapping any suspended particles, said filter means being placed on the top of said stack in said array in said holding 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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |