Patent US4441373A successfully refreshed from Google Patents.
US4441373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collection tube for drawing samples of biological fluids
Assignee: Baxter Healthcare Corp
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Filing: 1981-02-13
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Granted: 1984-04-10
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Expires: 2001-02-13
Abstract
Abstract A collection tube and method for drawing samples of blood and other biological fluids, such tube having a tip construction effective in promoting the entry of such fluids into the tube and, where the tube is designed to fill by capillary attraction, in enhancing the rate and extent of such action. The fine-bore tube is transparent and is cylindrical in shape with its tip beveled to define an oval planar end surface, the long axis of the oval intersecting a plane normal to the longitudinal axis of the tube at an acute angle within the range of about 35° to 60°.
Inventors
- 👤 Fred K. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:36
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/150007; A61B5/150343; A61B10/00; A61B10/0045; A61B5/150015; A61B5/150022; B; B01; B01L; B01L3/00; B01L3/02; B01L3/021
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
110 words
A collecting tube for drawing samples of blood and other biological fluids, comprising an open-ended tube formed of rigid transparent material and having a cylindrical bore, said tube having a beveled tip formed by a planar end surface having an oval opening defining the entrance to said bore, said end surface being sloped so that a line extending therealong and defining the long axis of said oval intersects a plane normal to the longitudinal axis of said bore at an acute angle within the range of about 35° to 60°, whereby, said oval opening promotes the spontaneous entry of a fluid sample into the bore when brought into contact therewith.
Claim 2
Dependent Claim
110 words
A collecting tube for drawing samples of blood and other biological fluids, comprising an open-ended tube formed of rigid transparent material and having a cylindrical bore, said tube having a beveled tip formed by a planar end surface having an oval opening defining the entrance to said bore, said end surface being sloped so that a line extending therealong and defining the long axis of said oval intersects a plane normal to the longitudinal axis of said bore at an acute angle within the range of about 35° to 60°, whereby, said oval opening promotes the spontaneous entry of a fluid sample into the bore when brought into contact therewith.
Claim 3
Dependent Claim
17 words
The tube of claim 1 in which said angle falls within the range of 40° to 55°.
Claim 4
Dependent Claim
17 words
The tube of claim 1 in which said angle falls within the range of 49° to 52°.
Claim 5
Dependent Claim
12 words
The tube of claim 1 in which said tube has hydrophobic surfaces.
Claim 6
Dependent Claim
18 words
The tube of claims 1, 2, 3, or 4 in which said tube is formed of plastic material.
Claim 7
Dependent Claim
23 words
The tube of claims 1, 2, 3, or 4, in which said cylindrical bore has a diameter no greater than about 2.0 millimeters.
Claim 8
Dependent Claim
114 words
A collecting tube for drawing samples of blood and other biological fluids, comprising a straight open-ended tube formed of rigid transparent polymeric material having a cylindrical bore of a diameter no greater than about 2.0 millimeters, said tube having a beveled tip defined by an oval planar end surface, said oval end surface having its long axis intersecting a plane normal to the longitudinal axis of said tube at an acute angle within the range of about 35° to 60°, whereby, said oval end surface and the opening therein promote the spontaneous entry of the fluid sample into the bore of the tube when said end surface is brought into contact with such sample.
Claim 9
Dependent Claim
114 words
A collecting tube for drawing samples of blood and other biological fluids, comprising a straight open-ended tube formed of rigid transparent polymeric material having a cylindrical bore of a diameter no greater than about 2.0 millimeters, said tube having a beveled tip defined by an oval planar end surface, said oval end surface having its long axis intersecting a plane normal to the longitudinal axis of said tube at an acute angle within the range of about 35° to 60°, whereby, said oval end surface and the opening therein promote the spontaneous entry of the fluid sample into the bore of the tube when said end surface is brought into contact with such sample.
Claim 10
Dependent Claim
17 words
The tube of claim 7 in which said angle falls within the range of 40° to 55°.
Claim 11
Dependent Claim
17 words
The tube of claim 7 in which said angle falls within the range of 49° to 52°.
Claim 12
Dependent Claim
12 words
The tube of claim 7 in which the surfaces thereof are hydrophobic.
Claim 13
Independent Claim
90 words
A method for promoting the spontaneous entry of blood and other biological fluids into an open-ended cylindrically-bored collecting tube having a beveled tip providing a planar annular oval end surface, the long axis of the oval end surface extending along a line intersecting a plane normal to the axis of said bore at an acute angle within the range of about 35° to 60°, comprising the step of advancing said planar oval end surface of said tip into direct facing contact with the surface of a body of biological fluid.
Claim 14
Independent Claim
90 words
A method for promoting the spontaneous entry of blood and other biological fluids into an open-ended cylindrically-bored collecting tube having a beveled tip providing a planar annular oval end surface, the long axis of the oval end surface extending along a line intersecting a plane normal to the axis of said bore at an acute angle within the range of about 35° to 60°, comprising the step of advancing said planar oval end surface of said tip into direct facing contact with the surface of a body of biological fluid.
Claim 15
Dependent Claim
17 words
The method of claim 11 in which said angle falls within the range of 40° to 55°.
Claim 16
Dependent Claim
57 words
The method of claim 11 in which the bore of said tube has a diameter no greater than about 2.0 millimeters and in which there is the further step of supporting said tube with said oval end surface thereof in direct facing contact with said body of biological fluid until said bore is filled by said fluid.
Claim 17
Independent Claim
99 words
A method of promoting the spontaneous entry of blood and other biological fluids into the tip of an open-ended cylindrically-bored collecting tube formed of polymeric material, comprising the steps of beveling the tip of said tube to provide a planar annular oval end surface, the long axis of the oval end surface extending along a line intersecting a plane normal to the axis of said bore at an acute angle within the range of about 35° to 60°, and thereafter advancing said planar oval end surface into direct facing contact with the surface of a body of biological fluid.
Claim 18
Independent Claim
99 words
A method of promoting the spontaneous entry of blood and other biological fluids into the tip of an open-ended cylindrically-bored collecting tube formed of polymeric material, comprising the steps of beveling the tip of said tube to provide a planar annular oval end surface, the long axis of the oval end surface extending along a line intersecting a plane normal to the axis of said bore at an acute angle within the range of about 35° to 60°, and thereafter advancing said planar oval end surface into direct facing contact with the surface of a body of biological fluid.
Claim 19
Dependent Claim
17 words
The method of claim 14 in which said angle falls within the range of 40° to 55°.
Claim 20
Dependent Claim
57 words
The method of claim 15 in which the bore of said tube has a diameter no greater than about 2.0 millimeters and in which there is the further step of supporting said tube with said oval end surface thereof in direct facing contact with said body of biological fluid until said bore is filled by said fluid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |