US3701434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test tube system for separating blood into serum and red cells
Assignee: Individual
•
Filing: 1971-03-15
•
Granted: 1972-10-31
•
Expires: 1991-03-15
Abstract
Abstract A test tube system for separating blood into serum and red cells. The system includes a first test tube, a second test tube and a connector joining the first test tube and the second test tube. The first test tube is for initially containing the blood sample and includes a sleevelike body portion that is closed at the upper end with s stopper and is closed at the lower end by a cap removably threaded on the end thereof. The first test tube has a plurality of non-wettable strands extending across the interior thereof for providing a place for the blood to clot. The connector is adapted to be threaded onto the lower end of the first test tube and the upper end of the second test tube. The connector includes a filter for the serum to flow therethrough into the second test tube.
Inventors
- 👤 Hugh C Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:26
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01D; B01D35/00; B01D36/00; B01D36/001; C; C12; C12M; C12M47/00; C12M47/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
279 words
A test tube system for separating blood into serum and red cells comprising a first sleevelike test tube body portion having an upper end and a lower end, stopper means removably received in the upper end of said first test tube body portion, a second test tube having one end open and the opposite end closed, connector means removably joining the lower end of said test tube body portion opposite from said stopper means and the open end of said second test tube to establish an assembly, said connector means including structure defining a passageway connecting the interior of said first test tube body portion with the interior of said second test tube, filter means disposed across said passageway between said first test tube body portion and said second test tube, said connector means being provided with an air hole extending from the outside atmosphere to the interior of said connector means on the second test tube side of said filter means to vent said second test tube to the outside atmosphere, said first test tube body portion being adapted to receive blood for the separation thereof into serum and red cells and said assembly being positionable in a substantially vertical disposition with said first test tube body portion being above said second test tube so that the serum is adapted to flow down by gravity through said filter means into said second test tube leaving the red cells in said first test tube body portion; including means extending across the interior of said first test tube body portion for providing a place for the blood to clot away from the sides of said first test tube body portion.
Claim 2
Dependent Claim
279 words
A test tube system for separating blood into serum and red cells comprising a first sleevelike test tube body portion having an upper end and a lower end, stopper means removably received in the upper end of said first test tube body portion, a second test tube having one end open and the opposite end closed, connector means removably joining the lower end of said test tube body portion opposite from said stopper means and the open end of said second test tube to establish an assembly, said connector means including structure defining a passageway connecting the interior of said first test tube body portion with the interior of said second test tube, filter means disposed across said passageway between said first test tube body portion and said second test tube, said connector means being provided with an air hole extending from the outside atmosphere to the interior of said connector means on the second test tube side of said filter means to vent said second test tube to the outside atmosphere, said first test tube body portion being adapted to receive blood for the separation thereof into serum and red cells and said assembly being positionable in a substantially vertical disposition with said first test tube body portion being above said second test tube so that the serum is adapted to flow down by gravity through said filter means into said second test tube leaving the red cells in said first test tube body portion; including means extending across the interior of said first test tube body portion for providing a place for the blood to clot away from the sides of said first test tube body portion.
Claim 3
Dependent Claim
34 words
The test tube system of claim 1 in which said means for providing a place for the blood to clot includes filament means extending across the interior of said first test tube body portion.
Claim 4
Dependent Claim
86 words
The test tube system of claim 2 in which is included a sleeve closely fitted in the interior of said first test tube body portion and being provided with a plurality of apertures therethrough, and in which said filament means includes a plurality of strand portions of a non-wettable material respectively extending across said sleeve from one side to the other and through pairs of said apertures to the outer sides of said sleeve, and means securing the ends of said strand portions to said sleeve.
Claim 5
Dependent Claim
177 words
A first test tube for containing a blood sample to be separated into serum and red cells, said first test tube comprising a sleevelike body portion having an upper end and a lower end, stopper means removably received in the upper end of said body portion for the closure thereof, cap means removably received on the lower end of said test tube body portion for the closure thereof, filament means extending across the interior of said first test tube body portion for providing a place for the blood to clot away from the sides of said first test tube body portion; including a sleeve closely fitted in the interior of said first test tube body portion and being provided with a plurality of apertures therethrough, and in which said filament means Includes a plurality of strand portions of a non-wettable material respectively extending across said sleeve from one side to the other and through pairs of said apertures to the outer sides of said sleeve, and means securing the ends of said strand portions to said sleeve.
Claim 6
Dependent Claim
177 words
A first test tube for containing a blood sample to be separated into serum and red cells, said first test tube comprising a sleevelike body portion having an upper end and a lower end, stopper means removably received in the upper end of said body portion for the closure thereof, cap means removably received on the lower end of said test tube body portion for the closure thereof, filament means extending across the interior of said first test tube body portion for providing a place for the blood to clot away from the sides of said first test tube body portion; including a sleeve closely fitted in the interior of said first test tube body portion and being provided with a plurality of apertures therethrough, and in which said filament means Includes a plurality of strand portions of a non-wettable material respectively extending across said sleeve from one side to the other and through pairs of said apertures to the outer sides of said sleeve, and means securing the ends of said strand portions to said sleeve.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |