US3974930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopper for specimen container
Assignee: Becton Dickinson and Co
•
Filing: 1975-04-09
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Granted: 1976-08-17
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Expires: 1995-04-09
Abstract
Abstract A stopper which is particularly adaptable to be mounted in an evacuated tube, for example, of the type employed in fluid collection procedures such as the sampling of blood under vacuum. The stopper is designed with a central shaft and a membrane located intermediate the ends of the central shaft. A part of the shaft above the membrane is narrowed upwardly to facilitate retention of a drop of fluid such as blood displaced from the tip of a needle as it is removed from the stopper after the collection procedure.
Inventors
- 👤 Pierre Gizard
- 👤 Jean Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:46
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/002; Y; Y10; Y10S; Y10S215/00; Y10S215/03
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
102 words
A stopper comprising; a body surmounted by a head, a central shaft closed by a membrane, said shaft having at least two portions, each of said shaft portions having an upper end and a lower end, the first portion of said shaft extending upwardly and narrowing inwardly from said membrane, the second portion of said shaft being directly connected at its lower end to the upper end of said first portion and diverging outwardly from the upper end of said first portion so as to provide a constriction at the area at which said first and second shaft portions are directly connected.
Claim 2
Dependent Claim
102 words
A stopper comprising; a body surmounted by a head, a central shaft closed by a membrane, said shaft having at least two portions, each of said shaft portions having an upper end and a lower end, the first portion of said shaft extending upwardly and narrowing inwardly from said membrane, the second portion of said shaft being directly connected at its lower end to the upper end of said first portion and diverging outwardly from the upper end of said first portion so as to provide a constriction at the area at which said first and second shaft portions are directly connected.
Claim 3
Dependent Claim
25 words
The invention in accordance with claim 1 wherein the first and second portions are fustroconical in configuration and taper inwardly toward their point of communication.
Claim 4
Dependent Claim
47 words
The invention in accordance with claim 1 wherein the angle with respect to the vertical at the upper end of the first portion is greater than 10° and the angle with respect to the vertical at the upper end of the second portion is less than 30°.
Claim 5
Dependent Claim
37 words
The invention in accordance with claim 1 wherein said central shaft has a third portion, said third portion extending upwardly and outwardly from the upper end of the second portion to the upper end of the head.
References Cited (Backward Citations)
US2334905A
Cited
US3106206A
Cited
US3330282A
Cited
US3313439A
Cited
US3460702A
Cited
US3653528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |