Patent US3883304A successfully refreshed from Google Patents.
US3883304A
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Method for testing pregnancy
Assignee: Conifer Laboratories Inc
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Filing: 1974-06-06
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Granted: 1975-05-13
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Expires: 1994-06-06
Abstract
Abstract An improved test for determining the pregnancy status of a female by testing the blood of the woman patient and a test reagent for use in said test, said test including thoroughly mixing the blood of the suspected woman with said test reagent and detecting the extent of agglutination of said blood, said test reagent comprising the combination of a solution of nitric, sulfuric, hydrochloric, or acetic acid and aqueous sodium chloride in concentrations effective to cause agglutination of the blood of a nonpregnant woman but precluding agglutination of the blood of a pregnant woman.
Inventors
- 👤 Clayton H Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:55
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/74; G01N33/76
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
101 words
A METHOD OF TESTING FEMALE BLOOD TO DETERMINED PREGNANCY COMPRISING THE STEPS OF PLACING A SMALL AMOUNT OF SAID BLOOD AND A SMALL AMOUNT OF A TEST REAGENT ON A TESTING SURFACE, SAID TEST REAGENT COMPRISING DISSOLVED SODIUM CHLORIDE IN THE APPROXIMATE RATIO OF BETWEEN 0.63 AND 1.08 GRAMS PER 100 CC OF SAID TEST REAGENT AND AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, SURFURIC ACID, HYDROCHLORIC ACID, AND ACETIC ACID EACH IN THE APPROXIMATE PERCENTAGE OF BETWEEN 0.15 AND 0.35%, THROUGHLY MIXING SAID BLOOD AND SAID TEST REAGENT, AND DETECTING THE EXTENT OF AGGLUTINATION OF THE BLOOD.
Claim 2
Independent Claim
101 words
A METHOD OF TESTING FEMALE BLOOD TO DETERMINED PREGNANCY COMPRISING THE STEPS OF PLACING A SMALL AMOUNT OF SAID BLOOD AND A SMALL AMOUNT OF A TEST REAGENT ON A TESTING SURFACE, SAID TEST REAGENT COMPRISING DISSOLVED SODIUM CHLORIDE IN THE APPROXIMATE RATIO OF BETWEEN 0.63 AND 1.08 GRAMS PER 100 CC OF SAID TEST REAGENT AND AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, SURFURIC ACID, HYDROCHLORIC ACID, AND ACETIC ACID EACH IN THE APPROXIMATE PERCENTAGE OF BETWEEN 0.15 AND 0.35%, THROUGHLY MIXING SAID BLOOD AND SAID TEST REAGENT, AND DETECTING THE EXTENT OF AGGLUTINATION OF THE BLOOD.
Claim 3
Dependent Claim
52 words
The method of claim 1 wherein said test reagent comprises dissolved sodium chloride in the approximate ratio of 0.81 grams per 100 cc of said test reagent and an acid selected from the group consisting of nitric acid, surfuric acid, hydrochloric acid, and acetic acid each in the approximate percentage of 0.26%.
Claim 4
Dependent Claim
37 words
The method of claim 1 wherein said test reagent comprises dissolved sodium chloride in the approximate ratio of 0.81 grams per 100 cc of said test reagent and in the approximate percentage of between 0.15 and 0.35%.
Claim 5
Dependent Claim
34 words
The method of claim 3 wherein said test reagent comprises dissolved sodium chloride in the approximate ratio of 0.81 grams per 100 cc of said test reagent and in the approximate percentage of 0.26%.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein said blood and said test reagent are combined in substantially equal quantities.
Claim 7
Dependent Claim
25 words
The method of claim 1 wherein said blood and test reagent are thoroughly mixed by rotating the blood on the testing surface for two minutes.
Claim 8
Dependent Claim
18 words
The method of claim 1 wherein the extent of agglutination of said blood is detected by visual observance.
Claim 9
Dependent Claim
23 words
The method of claim 7 wherein the extent of agglutination of said blood is determined by visually observing said blood under a microscope.
Claim 10
Dependent Claim
79 words
The method of claim 1 wherein said test reagent is prepared by combining nine parts of a sodium chloride solution prepared by dissolving sodium chloride in water in the approximate ratio of between 0.7 and 1.2 grams of sodium chloride per 100 cubic centimeters of water with one part of a solution selected from the group consisting of 1.5 to 3.5% nitric acid, 1.5 to 3.5% sulfuric acid, 1.5 to 3.5% hydrochloric acid, and 1.5 to 3.5% acetic acid.
Claim 11
Dependent Claim
68 words
The method of claim 9 wherein said test reagent is prepared by combining nine parts of a sodium chloride solution prepared by dissolving sodium chloride in water in the approximate ratio of 0.9 grams of sodium chloride per 100 cubic centimeters of water with one part of a solution selected from the group consisting of 2.6% nitric acid, 2.6% sulfuric acid, 2.6% hydrochloric acid and 2.6 acetic acid.
Claim 12
Dependent Claim
60 words
The method of claim 1 wherein said test reagent is prepared by cOmbining nine parts of a sodium chloride solution prepared by dissolving sodium chloride in water in the approximate ratio of between 0.7 grams and 1.2 grams of sodium chloride per 100 cubic centimeters of water with one part of a solution of approximately 1.5 to 3.5% nitric acid.
Claim 13
Dependent Claim
54 words
The method of claim 11 wherein said test reagent is prepared by combining nine parts of a sodium chloride solution prepared by dissolving sodium chloride in water in the approximate ratio of 0.9 grams of sodium chloride per 100 cubic centimeters of water with one part of a solution of approximately 2.6% nitric acid.
References Cited (Backward Citations)
US2796335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |