US3901219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood collecting container and method
Assignee: Becton Dickinson and Co
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Filing: 1974-07-25
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Granted: 1975-08-26
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Expires: 1994-07-25
Abstract
Abstract Disclosed herein is an apparatus and method for obtaining accurate, consistent filling of an evacuated blood collecting tube under varying atmospheric pressure conditions. The apparatus comprises a gas-proof tubular container having one open end and one closed end; a gas-proof, elastomeric self-sealing closure to seal the open end; an elastomeric barrier-piston which forms a sliding-seal with the interior side walls of the container; and an indentation for preventing the piston from traversing the entire length of the container. The method of the invention comprises employing the apparatus of the invention in the collection of mammalian blood. The apparatus and method of the invention is particularly useful for the collection of blood with a simultaneous admixture of a chemical additive.
Inventors
- 👤 Donald A Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5021
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
Apparatus for the collection of an accurate measure of blood which comprises: a gas-proof tubular container having one open end and one closed end; a gas-proof, elastomeric, self-sealing closure sealing said open end; an elastomeric barrier-piston formed of an elastomeric material and which forms a sliding-seal with the interior side walls of said container; means for preventing said piston from traversing the entire length of said container; provided that at least one of said closure and said piston has a recess in the surface thereof which is proximal to the other of said closure and said piston, said recess providing only the minimum space required to allow the needle room to penetrate the stopper and receive an initial flow of blood; and said apparatus having a partial vacuum in all chambErs within said container.
Claim 2
Dependent Claim
134 words
Apparatus for the collection of an accurate measure of blood which comprises: a gas-proof tubular container having one open end and one closed end; a gas-proof, elastomeric, self-sealing closure sealing said open end; an elastomeric barrier-piston formed of an elastomeric material and which forms a sliding-seal with the interior side walls of said container; means for preventing said piston from traversing the entire length of said container; provided that at least one of said closure and said piston has a recess in the surface thereof which is proximal to the other of said closure and said piston, said recess providing only the minimum space required to allow the needle room to penetrate the stopper and receive an initial flow of blood; and said apparatus having a partial vacuum in all chambErs within said container.
Claim 3
Dependent Claim
19 words
Apparatus according to claim 1 wherein said self-sealing closure has a thin zone which is penetrable by a cannula.
Claim 4
Dependent Claim
28 words
Apparatus according to claim 1 wherein said piston has integral sealing rings in the side walls thereof for forming a seal with the interior walls of said container.
Claim 5
Independent Claim
155 words
A method of collecting an accurate measure of blood which comprises: A. providing an air-evacuated tubular container having one open end and one closed end; a gas-proof elastomeric self-sealing closure sealing said open end; an elastomeric barrier-piston formed of an elastomeric material and which forms a sliding-seal with the interior side walls of said container; means for preventing said piston from traversing the entire length of said container; provided that at least one of said closure and said piston has a recess in the surface thereof which is proximal to the other of said closure and said piston, said recess providing only the minimum space required to allow the needle room to penetrate the stopper and receive an initial flow of blood; said apparatus having a partial vacuum in all chambers within said container; and B. filling said container by inserting a cannula into said recess, said cannula being attached to a source of blood.
Claim 6
Independent Claim
155 words
A method of collecting an accurate measure of blood which comprises: A. providing an air-evacuated tubular container having one open end and one closed end; a gas-proof elastomeric self-sealing closure sealing said open end; an elastomeric barrier-piston formed of an elastomeric material and which forms a sliding-seal with the interior side walls of said container; means for preventing said piston from traversing the entire length of said container; provided that at least one of said closure and said piston has a recess in the surface thereof which is proximal to the other of said closure and said piston, said recess providing only the minimum space required to allow the needle room to penetrate the stopper and receive an initial flow of blood; said apparatus having a partial vacuum in all chambers within said container; and B. filling said container by inserting a cannula into said recess, said cannula being attached to a source of blood.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |