US3919397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic preparation of NO
Assignee: Aerochem Research Laboratories Inc
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Filing: 1973-11-30
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Granted: 1975-11-11
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Expires: 1993-11-30
Abstract
Abstract A method and apparatus for converting oxides of nitrogen to nitric oxide is disclosed wherein the gas to be treated is passed through a plurality of alumina tubes each containing a wire of catalytic material which is wound into and through the tubes. The wire, preferably platinum, is connected to a source of electrical energy for resistively heating the wire. In its fashion, the gas to be treated flowing through the tubes is forced into intimate contact with the heated wire of catalyst material to speed the reaction and conversion of the gas to nitric oxide.
Inventors
- 👤 Robert Kindade Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:09
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/26; C01B21/265; C01B21/28; G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G01N33/0013; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/177692
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR PREPARING A CHEMILUMINESCENT REACTION SAMPLE BY THE CATALYTIC CONVERSION OF MIXTURE OF MITRIC OXIDE AND NITROGEN DIOXIDE GAS TO NITRIC OXIDE WITHOUT CONVERSION OF THE ORIGINAL NITRIC OXIDE COMPONENT COMPRISING HE STEPS OF: A. FLOWING THE GAS MIXTURE THROUGH A NETWORK OF PARALLEL FLOW TUBES HAVING A PLATINUM WIRE CATALYST WOND THROUGH SAID TUBES, THE DIMENSION OF SAID TUBES AND WIRE BEING SUCH THAT SUBSTANTIALLY ALL OF THE GAS MIXTURE IS BROUGHT INTO CLOSE INTIMATE CONTACT WITH SAID WIRE CATALYST AS THE GAS MIXTURE FLOWS THROUGH THE TUBES, AND B. RESSTIVELY HEATING SAID WIRE CATALYST TO APPROXIMATELY 950*C TO 1010*C TO CONVERT THE NITROGEN DIOXIDE COMPONENT SAID MIXTURE TO NITRIC OXIDE.
Claim 2
Dependent Claim
114 words
A PROCESS FOR PREPARING A CHEMILUMINESCENT REACTION SAMPLE BY THE CATALYTIC CONVERSION OF MIXTURE OF MITRIC OXIDE AND NITROGEN DIOXIDE GAS TO NITRIC OXIDE WITHOUT CONVERSION OF THE ORIGINAL NITRIC OXIDE COMPONENT COMPRISING HE STEPS OF: A. FLOWING THE GAS MIXTURE THROUGH A NETWORK OF PARALLEL FLOW TUBES HAVING A PLATINUM WIRE CATALYST WOND THROUGH SAID TUBES, THE DIMENSION OF SAID TUBES AND WIRE BEING SUCH THAT SUBSTANTIALLY ALL OF THE GAS MIXTURE IS BROUGHT INTO CLOSE INTIMATE CONTACT WITH SAID WIRE CATALYST AS THE GAS MIXTURE FLOWS THROUGH THE TUBES, AND B. RESSTIVELY HEATING SAID WIRE CATALYST TO APPROXIMATELY 950*C TO 1010*C TO CONVERT THE NITROGEN DIOXIDE COMPONENT SAID MIXTURE TO NITRIC OXIDE.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |