US3913790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical testing device
Assignee: Individual
•
Filing: 1974-08-23
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Granted: 1975-10-21
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Expires: 1994-08-23
Abstract
Abstract A medical testing device for mixing first and second liquids in a preselected ratio and especially adapted for testing the sugar content in urine. The device includes a housing having an outer surface and a chamber therein. First and second liquid inlet passageways extend from the outer surface of the housing and internally thereof and are adapted to receive unmeasured quantities of the first and second liquids. Each of the first and second inlet passageways has an outlet end. A transfer element having two cavities with volumes calibrated proportional to said preselected ratio. The element is movable in the housing between a first position with one of the cavities aligned with each of the outlet ends of the liquid inlet passageways and a second position with the cavities aligned with the housing chamber whereby measured volumes of liquid in the cavities are deposited into the chamber for mixing and testing.
Inventors
- 👤 Nancy Anne Seidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:09
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; G01N35/1097; G01N1/00; G01N1/28; G01N1/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
194 words
A medical testing device for mixing first and second liquids in a testing chamber, said device comprising: a housing having an outer surface and a visable testing chamber; first and second liquid inlet passageways in said housing intersecting said outer surface and adapted to receive unmeasured quantities of said first and second liquids, respectively; each of said first and second inlet passageways having a lower outlet and; a transfer element having two cavities with calibrated volumes; means for moving said transfer element in said housing between a first position with one of said cavities aligned with and in communication with each of said outlet ends and a second position with said cavities aligned with said chamber whereby measured volumes of said liquids in said cavities are deposited into said chamber for mixing and testing; first and second air vent passageways extending in said housing from said outer surface; and, third and fourth air vent passageways in said transfer element and each communicated with one of said cavities, said first and third air vent passageways and said second and fourth air vent passageways being in communication when said transfer element is in said second position.
Claim 2
Dependent Claim
194 words
A medical testing device for mixing first and second liquids in a testing chamber, said device comprising: a housing having an outer surface and a visable testing chamber; first and second liquid inlet passageways in said housing intersecting said outer surface and adapted to receive unmeasured quantities of said first and second liquids, respectively; each of said first and second inlet passageways having a lower outlet and; a transfer element having two cavities with calibrated volumes; means for moving said transfer element in said housing between a first position with one of said cavities aligned with and in communication with each of said outlet ends and a second position with said cavities aligned with said chamber whereby measured volumes of said liquids in said cavities are deposited into said chamber for mixing and testing; first and second air vent passageways extending in said housing from said outer surface; and, third and fourth air vent passageways in said transfer element and each communicated with one of said cavities, said first and third air vent passageways and said second and fourth air vent passageways being in communication when said transfer element is in said second position.
Claim 3
Dependent Claim
25 words
A medical testing device as defined in claim 1 wherein said transfer element is rotatable in said housing between said first and said second element.
Claim 4
Dependent Claim
48 words
A medical testing device as defined in claim 2 including a third inlEt passageway extending from said outer surface of said housing to said chamber and means for forming an opening in said transfer element, and aligning said opening with said passageway to allow access to said chamber.
Claim 5
Dependent Claim
24 words
A medical testing device as defined in claim 3 wherein said transfer element is rotatable in said housing between said first and second position.
Claim 6
Dependent Claim
24 words
A medical testing device as defined in claim 1 wherein said housing is formed from a clear plastic material allowing visability of said chamber.
Claim 7
Dependent Claim
25 words
A medical testing device as defined in claim 5 wherein said transfer element is rotatable in said housing between said first and said second element.
Claim 8
Dependent Claim
48 words
A medical testing device as defined in claim 5 including a third inlet passageway extending from said outer surface of said housing to said chamber and means for forming an opening in said transfer element, and aligning said opening with said passageway to allow access to said chamber.
References Cited (Backward Citations)
US3723851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |