US4384581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microsyringe
Assignee: Becton Dickinson and Co
•
Filing: 1981-08-18
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Granted: 1983-05-24
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Expires: 2001-08-18
Abstract
Abstract A microsyringe includes an elongated hollow tube having no piston, plunger or the like positioned in its lumen. A needle cannula is at one end of the tube in fluid communication with the lumen. A connector hub is at the other end of the tube for attachment to a device for providing a fluid movement force into the lumen.
Inventors
- 👤 Hugh T. Conway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:17
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31525; A61M5/31531
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A microsyringe comprising an elongated, slender capillary tube having a lumen therethrough, a needle cannula at a distal end of said tube in fluid communication with said lumen, and a connector hub at a proximal end of said tube for attachment to means for providing a fluid movement force into said lumen, and a slidable indicator in said lumen, said indicator being slidable under the influence of a fluid force entering said lumen for indicating the amount of fluid inside said tube, said indicator being a flotation member which floats at the level of fluid in said lumen.
Claim 2
Dependent Claim
98 words
A microsyringe comprising an elongated, slender capillary tube having a lumen therethrough, a needle cannula at a distal end of said tube in fluid communication with said lumen, and a connector hub at a proximal end of said tube for attachment to means for providing a fluid movement force into said lumen, and a slidable indicator in said lumen, said indicator being slidable under the influence of a fluid force entering said lumen for indicating the amount of fluid inside said tube, said indicator being a flotation member which floats at the level of fluid in said lumen.
Claim 3
Dependent Claim
31 words
The microsyringe of claim 1 wherein said slidable indicator is positioned completely within said lumen, said microsyringe further comprising means for preventing said slidable indicator from sliding out of said lumen.
Claim 4
Dependent Claim
15 words
The microsyringe of claim 1 wherein said slidable indicator is made from an elastomeric material.
Claim 5
Dependent Claim
23 words
The microsyringe of claim 1 wherein said capillary tube is translucent and has graduations on its outside surface to indicate specific volume measurements.
Claim 6
Dependent Claim
16 words
The microsyringe of claim 1 wherein said capillary tube is rigid and is made of glass.
Claim 7
Dependent Claim
80 words
A microsyringe comprising an elongated hollow tube having a lumen therethrough, a needle cannula at one end of said tube in fluid communication with said lumen, a connector hub at the other end of said tube for attachment to means for providing a fluid movement force into said lumen, and slidable indicator means in said lumen, said indicator means being slidably responsive to a fluid force entering said lumen and being flotable at the level of fluid in said lumen.
Claim 8
Dependent Claim
80 words
A microsyringe comprising an elongated hollow tube having a lumen therethrough, a needle cannula at one end of said tube in fluid communication with said lumen, a connector hub at the other end of said tube for attachment to means for providing a fluid movement force into said lumen, and slidable indicator means in said lumen, said indicator means being slidably responsive to a fluid force entering said lumen and being flotable at the level of fluid in said lumen.
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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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |