Chemistry: analytical and immunological testing – Nitrogen containing – Oxides of nitrogen
Reexamination Certificate
2005-03-15
2005-03-15
Gakh, Yelena G. (Department: 1743)
Chemistry: analytical and immunological testing
Nitrogen containing
Oxides of nitrogen
C436S116000, C436S117000, C436S155000, C436S159000, C436S160000, C422S078000
Reexamination Certificate
active
06867047
ABSTRACT:
Methods and apparatus are described for preventing nitrogen interference in the detection of a substance. In particular, it relates to new methods and apparatus for preventing interference due to nitrogen in pyro-electrochemical methods for measuring substances, for example sulfur content, contained within liquids such as petroleum products and beverages. One preferred apparatus and method comprises a catalytic converter or thermal converter to selectively remove the nitrogen-containing interferant, for example NO2, in the pyrolyzed gas stream to NO without affecting the sulfur content. A second preferred apparatus and method comprises a chemical scrubber to selectively remove the nitrogen-containing interferant from the gas stream without affecting the sulfur content.
REFERENCES:
patent: 3622488 (1971-11-01), Chand et al.
patent: 3650696 (1972-03-01), Eads
patent: 3795812 (1974-03-01), Okabe
patent: 3838969 (1974-10-01), Dugan
patent: 3840341 (1974-10-01), Rogers
patent: 3894419 (1975-07-01), Mator et al.
patent: 3925332 (1975-12-01), Naito et al.
patent: 3976450 (1976-08-01), Marcote et al.
patent: 4004882 (1977-01-01), Byrne et al.
patent: 4018562 (1977-04-01), Parks et al.
patent: 4066409 (1978-01-01), Fine
patent: 4070155 (1978-01-01), Fraim
patent: 4077774 (1978-03-01), Neti et al.
patent: 4172705 (1979-10-01), Castro et al.
patent: 4223324 (1980-09-01), Yamamori et al.
patent: 4257772 (1981-03-01), Bognin et al.
patent: 4257777 (1981-03-01), Dymond et al.
patent: 4272248 (1981-06-01), Neti
patent: 4293308 (1981-10-01), Sisti et al.
patent: 4301114 (1981-11-01), Rounbehler et al.
patent: 4330298 (1982-05-01), Hawn et al.
patent: 4332591 (1982-06-01), Oi et al.
patent: 4351801 (1982-09-01), Bartke
patent: 4352779 (1982-10-01), Parks
patent: 4401763 (1983-08-01), Itoh
patent: 4409336 (1983-10-01), Oita
patent: 4467038 (1984-08-01), Scott
patent: 4587003 (1986-05-01), Tantram et al.
patent: 4633021 (1986-12-01), Hanes
patent: 4633704 (1987-01-01), Tantram et al.
patent: 4678756 (1987-07-01), Parks
patent: 4765961 (1988-08-01), Schiff et al.
patent: 4766760 (1988-08-01), Poshemansky et al.
patent: 4778764 (1988-10-01), Fine
patent: 4843016 (1989-06-01), Fine
patent: 5152963 (1992-10-01), Wreyford
patent: 5227135 (1993-07-01), Godec et al.
patent: 5310683 (1994-05-01), Godec et al.
patent: 5330714 (1994-07-01), Godec et al.
patent: 5395501 (1995-03-01), Rohrbacker et al.
patent: 5397708 (1995-03-01), Lessard et al.
patent: 5409591 (1995-04-01), Baker et al.
patent: 5424217 (1995-06-01), Benner et al.
patent: 5466350 (1995-11-01), Baker et al.
patent: 5501981 (1996-03-01), Ray et al.
patent: 5580433 (1996-12-01), Baker et al.
patent: 5614417 (1997-03-01), Kubala et al.
patent: 5632875 (1997-05-01), Chapples et al.
patent: 5661036 (1997-08-01), Benner et al.
patent: 5668302 (1997-09-01), Finbow et al.
patent: 5916523 (1999-06-01), Yan et al.
patent: 5935519 (1999-08-01), Benner et al.
patent: 6013530 (2000-01-01), Tawara
patent: 6057162 (2000-05-01), Rounbehler et al.
patent: 6130095 (2000-10-01), Shearer
patent: 6143245 (2000-11-01), Yan et al.
patent: 2017315 (1979-10-01), None
patent: 1578281 (1980-11-01), None
patent: 2049952 (1980-12-01), None
patent: 2319606 (1996-06-01), None
patent: WO 9407134 (1994-03-01), None
patent: WO 9522049 (1995-08-01), None
patent: WO 9918430 (1999-04-01), None
patent: WO 9958950 (1999-11-01), None
patent: WO 0146683 (2001-06-01), None
Liu “Molybdenum carbide as catalyst for conversion of nitrogen dioxide to nitric oxide”, Huanjing Huaxue, 1986, v. 5, No. 6, pp. 30-33 (Abstract).*
“Standard test method for total trace nitrogen and its derivatives in liquid aromatic hydrocarbons by oxidative combustion and electrochemical detection,” American Society for Testing and Materials, Designation: D 6366-99, 1999.
“Test method for total sulfur in liquid aromatic hydrocarbons and their derivatives by oxidative combustion and electrochemical detection,” American Society for Testing and Materials, Designation: D 6428-99, 1999.
“Standard test method for trace nitrogen in liquid petroleum hydrocarbons by syringe/inlet oxidative combustion and chemiluminesence detection,” The American Society for Testing and Materials, Designation: D 4629-96.
“Standard test method for determination of total sulfur in light hydrocarbons, motor fuels and oils by ultraviolet fluorescence,” The American Society for Testing and Materials, Designation: D 5453-93.
Frontijn, et al., “Homogenous chemiluminescent measurement of nitric oxide with ozone,”Analytical Chemistry, vol. 42, No. 6, 575-79, May 1970.
Schwarz, et al., “Fluorescence detection of dulfur fioxide in air at the parts per billion level,”Analytical Chemistry, vol. 46, No. 8, 1024-28 Jul. 1974.
EP 0127387 A2, 1984.
EP 0366262 A2, 1990.
GB 2323171, 1997.
Gakh Yelena G.
Spectro Analytical Instruments
Vinson & Elkins L.L.P.
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