Patent US2744626A successfully refreshed from Google Patents.
Patent US3693327A successfully refreshed from Google Patents.
US3693327A
Expired / Lapsed
US
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Filters and carbon monoxide indicators
Assignee: Individual
•
Filing: 1970-12-30
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Granted: 1972-09-26
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Expires: 1990-12-30
Abstract
Abstract A filter wherein the filter medium is selected from the group consisting of amorphous hemoglobin, crystalline hemoglobin, amorphous heme and crystalline heme in the presence of a stoichiometric excess, with regard to the iron in said hemoglobin or heme, of a suitable reductant. The filter is adapted to remove carbon monoxide from air or the gases inhaled by a smoker. The filter medium assumes a predetermined color and infrared absorptivity characteristic when exposed to a predetermined quantity of carbon monoxide. Support for said filter medium may be provided with windows for visual access to said filter medium and automatic means may be provided for replacing said filter medium in response to detection of said color or infrared characteristics. Hemoglobin or heme in the presence of a suitable reductant may also serve as a carbon monoxide detector.
Inventors
- 👤 Israel Herbert Scheinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:31
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; A; A62; A62B; A62B21/00; B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/22
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
20 words
A filter medium as recited in claim 1, wherein said filter medium is hemoglobin and said reductant is ascorbic acid.
Claim 2
Dependent Claim
20 words
A filter medium as recited in claim 1, wherein said filter medium is hemoglobin and said reductant is methylene blue.
Claim 3
Dependent Claim
47 words
A filter medium as recited in claim 1, wherein said medium is prepared so that, upon exposure to a predetermined quantity of carbon monoxide, it will absorb a lesser proportion of infrared rays applied thereto, as compared with the proportion of infrared rays absorbable before such exposure.
Claim 4
Dependent Claim
30 words
A filter medium as recited in claim 1, wherein said medium is prepared so that it will assume a distinctive color upon exposure to a predetermined quantity of carbon monoxide.
Claim 5
Dependent Claim
15 words
A filter medium as recited in claim 5, wherein said color is a cherry red.
Claim 6
Dependent Claim
60 words
A filter for interposition between tobacco for smoking and the smoker comprising a filter medium selected from the group consisting of amorphous hemoglobin, crystalline hemoglobin, amorphous heme and crystalline heme, including a reducing agent which maintains the hemoglobin or heme in the ferrous state and being in a stoichiometric excess, with regard to the iron in said hemoglobin or heme.
Claim 7
Dependent Claim
20 words
A filter medium as recited in claim 7, wherein said filter medium is hemoglobin and said reductant is ascorbic acid.
Claim 8
Dependent Claim
20 words
A filter medium as recited in claim 7, wherein said filter medium is hemoglobin and said reductant is methylene blue.
Claim 9
Dependent Claim
35 words
A filter as recited in claim 7, and including means for supporting said filter medium, said support means including a window portion aligned with said filter medium to permit visual examination of said filter medium.
Claim 10
Dependent Claim
29 words
A filter as recited in claim 10, wherein said window is positioned in alignment with at least the portion of said filter medium adapted to be proximate the smoker.
Claim 11
Dependent Claim
30 words
A filter as recited in claim 10, wherein said filter medium is prepared so that it will assume a distinctive color upon exposure to a predetermined quantity of carbon monoxide.
Claim 12
Dependent Claim
14 words
A filter as recited in claim 12, wherein said color is a cherry red.
Claim 13
Dependent Claim
34 words
A filter as recited in claim 10, wherein said support means includes a chamber for receiving said filter medium and means for providing access to said chamber for the replacement of said filter medium.
Claim 14
Dependent Claim
22 words
A filter as recited in claim 7, wherein said filter medium is formed from amorphous or crystalline hemoglobin at an acid pH.
Claim 15
Dependent Claim
16 words
A filter as recited in claim 15, wherein said hemoglobin is formed at about pH 4.
Claim 16
Dependent Claim
22 words
A filter as recited in claim 7, wherein said filter medium is formed from amorphous or crystalline hemoglobin at an alkaline pH.
Claim 17
Dependent Claim
16 words
A filter as recited in claim 17, wherein said hemoglobin is formed at about pH 9.
Claim 18
Dependent Claim
64 words
An air filter comprising support means and a filter medium carried by said support means, said filter medium being selected from the group consisting of amorphous hemoglobin, crystalline hemoglobin, amorphous heme and crystalline heme, including a reducing agent which maintains the hemoglobin or heme in the ferrous state and being in a stoichiometric excess, with regard to the iron in said hemoglobin or heme.
Claim 19
Dependent Claim
20 words
A filter medium as recited in claim 19, wherein said filter medium is hemoglobin and said reductant is ascorbic acid.
Claim 20
Dependent Claim
20 words
A filter medium as recited in claim 19, wherein said filter medium is hemoglobin and said reductant is methylene blue.
Claim 21
Dependent Claim
22 words
An air filter as recited in claim 19, wherein said support means includes window means to permit viewing of said filter medium.
Claim 22
Dependent Claim
37 words
A filter as recited in claim 19, including detecting means for detecting a predetermined change in selected characteristics of said filter medium indicative of the exposure of said filter medium to a predetermined quantity of carbon monoxide.
Claim 23
Dependent Claim
25 words
A filter as recited in claim 23, wherein said detecting means includes light sensitive means adapted to detect changes in color of said filter medium.
Claim 24
Dependent Claim
24 words
A filter as recited in claim 23, including infrared sensitive means adapted to detect changes in infrared wave absorption characteristics of said filter medium.
Claim 25
Dependent Claim
48 words
A filter as recited in claim 23, wherein said support means includes filter medium replacement means responsive to said detecting means and operative to replace said filter medium upon detection by said detecting means of the exposure of said filter medium to a predetermined quantity of carbon monoxide.
Claim 26
Dependent Claim
75 words
A filter as recited in claim 19, wherein said filter medium is formed from amorphous hemoglobin or heme as a sheet, said support means including a pair of spaced roller means for supporting a portion of said sheet filter medium in the path of said air, said support means including means for coordinately rotating said pair of roller means for positioning successive incremental lengths of said sheet filter medium in the path of said air.
Claim 27
Dependent Claim
30 words
A filter as recited in claim 19 and including blower means for the selective direction of relatively carbon monoxide-free air or oxygen against said filter medium for the regeneration thereof.
Claim 28
Dependent Claim
76 words
A filter arrangement comprising a filter medium selected From the group consisting of hemoglobin and heme, including a reducing agent which maintains the hemoglobin or heme in the ferrous state and being in a stoichiometric excess, with regard to the iron in said hemoglobin or heme; and detecting means for detecting a predetermined change in selected characteristics of said filter medium indicative of the exposure of said filter medium to a predetermined quantity of carbon monoxide.
Claim 29
Dependent Claim
20 words
A filter medium as recited in claim 29, wherein said filter medium is hemoglobin and said reductant is ascorbic acid.
Claim 30
Dependent Claim
20 words
A filter medium as recited in claim 29, wherein said filter medium is hemoglobin and said reductant is methylene blue.
Claim 31
Dependent Claim
26 words
A filter arrangement as recited in claim 29, wherein said detecting means includes light sensitive means adapted to detect changes in color of said filter medium.
Claim 32
Dependent Claim
29 words
A filter arrangement as recited in claim 29, wherein said detecting means includes infrared sensitive means adapted to detect changes in infrared wave absorption characteristics of said filter medium.
Claim 33
Dependent Claim
52 words
A filter arrangement as recited in claim 29, and including support means, said support means including filter medium replacement means responsive to said detecting means and operative to replace said filter medium upon detection by said detecting means of the exposure of said filter medium to a predetermined quantity of carbon monoxide.
Claim 34
Dependent Claim
99 words
A carbon monoxide detection arrangement comprising a filter medium selected from the group consisting of hemoglobin and heme, including a reducing agent which maintain the hemoglobin or heme in the ferrous state and being in a stoichiometric excess, with regard to the iron in said hemoglobin or heme; detecting means for detecting a predetermined change in selected characteristics of said filter medium indicative of the exposure of said filter medium to a predetermined quantity of carbon monoxide; and alarm means responsive to said detecting means for providing an alarm in the presence of said predetermined quantity of carbon monoxide.
Claim 35
Dependent Claim
20 words
A detection arrangement as recited in claim 35, wherein said detection medium is hemoglobin and said reductant is ascorbic acid.
Claim 36
Dependent Claim
20 words
A filter medium as recited in claim 35, wherein said detection medium is hemoglobin and said reductant is methylene blue.
Claim 37
Dependent Claim
26 words
A detection arrangement as recited in claim 35, wherein said detecting means includes light sensitive means adapted to detect changes in color of said detection medium.
Claim 38
Dependent Claim
29 words
A detection arrangement as recited in claim 35, wherein said detecting means includes infrared sensitive means adapted to detect changes in infrared wave absorption characteristics of said detection medium.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |