Patent US3849256A successfully refreshed from Google Patents.
US3849256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrate-containing test container
Assignee: Individual
•
Filing: 1972-10-13
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Granted: 1974-11-19
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Expires: 1992-10-13
Abstract
Abstract A device for use in and a method of testing for example, a liquid or gas, preferably urine, in respect of the concentration of impurities therein, its resistance to certain substances or for measuring the concentration in a sample under investigation. Said device comprising a casing having a removable lid and a hollow testing column disposed within the casing, the testing column having a number of test fields which are spaced apart from each other and which are located along respective parts of the surface of the column, which parts face the casing.
Inventors
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Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:52
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/02; C12Q1/18; C12Q1/20; B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01L2300/00; B01L2300/06; B01L2300/0609; B01L2300/0618; B01L2300/0627; B01L2300/0663; Y; Y10; Y10S; Y10S206/00; Y10S206/806; Y10S435/00; Y10S435/805
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
A FLUID TESTING DEVICE COMPRISING A CASING, HAVING A REMOVABLE SCREW LID, AND A HOLLOW TESTING COLUM DISPOSED WITHIN THE CASEING SAID TESTING COLUMN HAVING A NUMBER OF TEST FIELDS SPACED APART FROM EACH OTHER SAID TEST FIELDS BEING LOCATED ALONG RESPECTIVE PARTS OF THE SURFACE OF THE COLUMN, FACING THE CASING, AN ANNULAR GROOVE FORMED IN THE LOWER FACE OF SAID LID AND SUSPENSION MEANS PROJECTING FROM THE UPPER PART OF SAID TESTING COLUMN INTO SAID ANNULAR GROOVE FOR DETACHABLY HOLDING SAID TESTING COLUMN.
Claim 2
Dependent Claim
85 words
A FLUID TESTING DEVICE COMPRISING A CASING, HAVING A REMOVABLE SCREW LID, AND A HOLLOW TESTING COLUM DISPOSED WITHIN THE CASEING SAID TESTING COLUMN HAVING A NUMBER OF TEST FIELDS SPACED APART FROM EACH OTHER SAID TEST FIELDS BEING LOCATED ALONG RESPECTIVE PARTS OF THE SURFACE OF THE COLUMN, FACING THE CASING, AN ANNULAR GROOVE FORMED IN THE LOWER FACE OF SAID LID AND SUSPENSION MEANS PROJECTING FROM THE UPPER PART OF SAID TESTING COLUMN INTO SAID ANNULAR GROOVE FOR DETACHABLY HOLDING SAID TESTING COLUMN.
Claim 3
Dependent Claim
16 words
A device according to claim 1, wherein the testing column has a substantially triangular cross section.
Claim 4
Dependent Claim
24 words
A device according to claim 2, wherein the testing column was manufactured in one piece by injection moulding and folded into its cross section.
Claim 5
Dependent Claim
17 words
A device according to claim 1, wherein the test fields are each coated with a testing medium.
Claim 6
Dependent Claim
18 words
A device according to claim 4, wherein at least one of the test fields contains a culture medium.
Claim 7
Dependent Claim
14 words
A device according to claim 1, wherein the test fields contain different testing media.
Claim 8
Dependent Claim
18 words
A device according to claim 1 wherein different test fields contain the same testing medium in different concentrations.
Claim 9
Dependent Claim
42 words
A device according to claim 1, including a stationary resistance pad spaced from the face of said testing column that when the testing column is immersed in the fluid to be tested, the testing pad is caused to contact the test field.
Claim 10
Dependent Claim
46 words
A device according to claim 8, wherein the resistance pad is held in position by means of a spacer, one end of which is fixed at the bottom edge of the respective test field and the other end of which carries the resistance pad cantilevered therefrom.
Claim 11
Dependent Claim
24 words
A device according to claim 9, including a fluid barrier arranged on a part of the spacer which is located above the testing medium.
Claim 12
Dependent Claim
18 words
A device according to claim 9 wherein the resistance pad and spacer are formed of an absorbant material.
Claim 13
Dependent Claim
29 words
A device according to claim 9 wherein the resistance pad is divided into several test zones which are to be separated from each other by means of fluid barriers.
Claim 14
Dependent Claim
21 words
A device according to claim 1 wherein said annular groove and said projecting means are provided with cooperatively engaging retaining means.
Claim 15
Dependent Claim
23 words
A device according to claim 13, wherein said projecting means are hook prongs and said annular groove is formed with a receiving collar.
References Cited (Backward Citations)
US3651926A
Cited
US3701717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |