US5242832A — Reagent for measurement of leukocytes and hemoglo…

Claim 1

Independent Claim 319 words

A reagent for use in counting the number of leukocytes and measuring the hemoglobin concentration in a blood sample, said reagent not containing cyanides and being able to maintain hemoglobin in a substantially stable state for a prolonged time comprising: a solution with a pH ranging from 3.0 to 9.0 containing: i) at least one first surfactant, said at least one first surfactant being cationic and of a concentration capable of hemolyzing erythrocytes in the blood sample being quaternary ammonium salts of the formula: ##STR17## where R 1 is a C 8 to C 20 alkyl, alkenyl or alkynyl group, R 2 and R 4 is a C 1 to C 8 alkyl, alkenyl or alkynyl group, R 3 is a C 1 to C 8 alkyl, alkenyl, alkynyl or benzyl group, and X - is an anionic group; said quaternary ammonium salts having a total concentration in the range of 0.1 to 15.0 g/l; and ii) at least one second surfactant selected from the group consisting of pyridinium salts and amphoteric surfactants, said pyridinium salts having the formula: ##STR18## where n is an integer of from 7 to 19, X - is an anionic group, said pyridinium salts having a total concentration in the range of from 0.1 to 15.0 g/l; and said amphoteric surfactants having the formula: ##STR19## where R 1 is a C 8 to C 20 alkyl group, and R 2 and R 3 are C 1 to C 8 alkyl, alkenyl or alkynyl groups, said amphoteric surfactants having a total concentration in the range of 0.1 to 15.0 g/l; and iii) at least one hemoglobin stabilizer selected from the group consisting of: Tiron, at a concentration of 0.1 to 1000 mg/l and of the formula: ##STR20## 8-hydroxyquinoline, at a concentration of 0.1 to 1000 mg/l and of the formula: ##STR21## bipyridine, at a concentration of 10 to 10000 mg/l and of the formula: ##STR22##

Claim 2

Dependent Claim 319 words

A reagent for use in counting the number of leukocytes and measuring the hemoglobin concentration in a blood sample, said reagent not containing cyanides and being able to maintain hemoglobin in a substantially stable state for a prolonged time comprising: a solution with a pH ranging from 3.0 to 9.0 containing: i) at least one first surfactant, said at least one first surfactant being cationic and of a concentration capable of hemolyzing erythrocytes in the blood sample being quaternary ammonium salts of the formula: ##STR17## where R 1 is a C 8 to C 20 alkyl, alkenyl or alkynyl group, R 2 and R 4 is a C 1 to C 8 alkyl, alkenyl or alkynyl group, R 3 is a C 1 to C 8 alkyl, alkenyl, alkynyl or benzyl group, and X - is an anionic group; said quaternary ammonium salts having a total concentration in the range of 0.1 to 15.0 g/l; and ii) at least one second surfactant selected from the group consisting of pyridinium salts and amphoteric surfactants, said pyridinium salts having the formula: ##STR18## where n is an integer of from 7 to 19, X - is an anionic group, said pyridinium salts having a total concentration in the range of from 0.1 to 15.0 g/l; and said amphoteric surfactants having the formula: ##STR19## where R 1 is a C 8 to C 20 alkyl group, and R 2 and R 3 are C 1 to C 8 alkyl, alkenyl or alkynyl groups, said amphoteric surfactants having a total concentration in the range of 0.1 to 15.0 g/l; and iii) at least one hemoglobin stabilizer selected from the group consisting of: Tiron, at a concentration of 0.1 to 1000 mg/l and of the formula: ##STR20## 8-hydroxyquinoline, at a concentration of 0.1 to 1000 mg/l and of the formula: ##STR21## bipyridine, at a concentration of 10 to 10000 mg/l and of the formula: ##STR22##

Claim 3

Dependent Claim 282 words

10-phenanthroline and its derivatives, at a concentration of 10 to 3000 mg/l and of the formula: ##STR23## where R 1 and R 4 are --H, --CH 3 ; R 2 and R 3 are --H, phenyl group, --OH; phenolic compounds, at a concentration of 0.1 to 1000 mg/l and of the formula: ##STR24## where R 1 is a --H, CH 2 OH, --CHO, --COOH or --OH, R 2 is a --H, --COOH, or --OH, R 3 is a --H or --COOH; bisphenol A, at a concentration of 0.1 to 1000 mg/l and of the formula: ##STR25## pyrazole and its derivatives, at a concentration of 0.1 to 10000 mg/l and of the formula: ##STR26## where R 1 , R 2 , and R 3 are --H or C 1 to C 1 lower alkyl groups; a first phenyl 5-pyrazolone and its derivatives, at a concentration of 0.1 to 10000 mg/l and of the formula: ##STR27## where R 1 and R 2 are --H or a C 1 to C 4 lower alkyl group; a second phenyl 5-pyrazolone and its derivatives, at a concentration of 0.1 to 10000 mg/l and of the formula: ##STR28## where R 1 , R 2 , and R 3 are --H or a C 1 to C 4 lower alkyl group; phenyl 3-pyrazolone, at a concentration of 0.1 to 10000 mg/l and of the formula: ##STR29## and imidazole and its derivatives, at a concentration of 1 to 20000 mg/l and of the formula: ##STR30## where R 1 and R 2 are --H or a C 1 to C 4 lower alkyl group; R 3 is --H or a C 1 to C 4 lower alkyl group or phenyl group.

Claim 4

Dependent Claim 282 words

10-phenanthroline and its derivatives, at a concentration of 10 to 3000 mg/l and of the formula: ##STR23## where R 1 and R 4 are --H, --CH 3 ; R 2 and R 3 are --H, phenyl group, --OH; phenolic compounds, at a concentration of 0.1 to 1000 mg/l and of the formula: ##STR24## where R 1 is a --H, CH 2 OH, --CHO, --COOH or --OH, R 2 is a --H, --COOH, or --OH, R 3 is a --H or --COOH; bisphenol A, at a concentration of 0.1 to 1000 mg/l and of the formula: ##STR25## pyrazole and its derivatives, at a concentration of 0.1 to 10000 mg/l and of the formula: ##STR26## where R 1 , R 2 , and R 3 are --H or C 1 to C 1 lower alkyl groups; a first phenyl 5-pyrazolone and its derivatives, at a concentration of 0.1 to 10000 mg/l and of the formula: ##STR27## where R 1 and R 2 are --H or a C 1 to C 4 lower alkyl group; a second phenyl 5-pyrazolone and its derivatives, at a concentration of 0.1 to 10000 mg/l and of the formula: ##STR28## where R 1 , R 2 , and R 3 are --H or a C 1 to C 4 lower alkyl group; phenyl 3-pyrazolone, at a concentration of 0.1 to 10000 mg/l and of the formula: ##STR29## and imidazole and its derivatives, at a concentration of 1 to 20000 mg/l and of the formula: ##STR30## where R 1 and R 2 are --H or a C 1 to C 4 lower alkyl group; R 3 is --H or a C 1 to C 4 lower alkyl group or phenyl group.

Claim 5

Dependent Claim 55 words

The reagent according to claim 1, wherein said first surfactant has a total concentration in the range of 0.1 to 12 g/l, and said second surfactant is an amphoteric surfactant having a total concentration in the range of 0.1 to 12 g/l, and said reagent is capable of dividing leukocytes into at least two fractions.

Claim 6

Dependent Claim 53 words

The reagent according to claim 1, wherein said first surfactant has a total concentration in the range of 1 to 10 g/l, and said second surfactant is an amphoteric surfactant having a total concentration in the range of 0.1 to 10 g/l, and said reagent is capable of dividing leukocytes into three fractions.

Claim 7

Dependent Claim 55 words

The reagent according to claim 1, wherein said first surfactant has a total concentration in the range of 0.1 to 12 g/l, and said second surfactant is a pyridinium salt having a total concentration in the range of 0.3 to 10 g/l, and said reagent is capable of dividing leukocytes into at least two fractions.

Claim 8

Dependent Claim 53 words

The reagent according to claim 1, wherein said first surfactant has a total concentration in the range of 1 to 10 g/l, and said second surfactant is a pyridinium salt having a total concentration in the range of 1 to 5 g/l, and said reagent is capable of dividing leukocytes into three fractions.

Claim 9

Dependent Claim 149 words

The reagent according to claim 1, further comprising at least one additional surfactant selected from the group consisting of nonionic and cationic surfactants, said nonionic surfactant has the formula: R.sub.1 --R.sub.2 --(CH.sub.2 CH.sub.2 O).sub.n --H (d) where R 1 is a C 8 to C 20 alkyl, alkenyl or alkynyl group, R 2 is --O--, ##STR31## or --COO--, and n is an integer of from 10 to 50; said nonionic surfactant having a total concentration in the range of 0.1 to 15.0 g/l, and said cationic surfactant has the formula: ##STR32## where R 1 is a C 8 to C 20 alkyl, alkenyl or alkynyl group, R 2 , R 3 and R 4 is a hydrogen, C 1 to C 8 alkyl, alkenyl or alkynyl group, and X - is an anionic group; said cationic surfactant having a total concentration in the range of 0.1 to 15.0 g/l.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1996-09-06	1997-03-08	1997-09-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2000-09-06	2001-03-08	2001-09-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2004-09-06	2005-03-08	2005-09-07	$7700.00	Window Closed / Lapsed

Reagent for measurement of leukocytes and hemoglobin in blood

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