Patent US4240423A successfully refreshed from Google Patents.
US4240423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autoclavable transparent needle
Assignee: Baxter International Inc
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Filing: 1978-10-23
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Granted: 1980-12-23
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Expires: 1998-10-23
Abstract
Abstract A hypodermic needle having a cannula secured to a transparent polycarbonate hub having a deflection temperature of approximately 270° to 290° F., which needle is autoclavable in the range of approximately 240° to 260° F. without substantial distortion.
Inventors
- 👤 David S. Akhavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:23
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/34; A61M5/349; Y; Y10; Y10S; Y10S604/00; Y10S604/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
An autoclavable needle comprising: a metal cannula; an epoxy capable of firmly bonding at temperatures in excess of 200° F., which epoxy is permanently secured to the cannula; and permanently secured to this epoxy is a transparent polycarbonate hub having a deflection temperature in excess of 200° F., whereby both the metal-epoxy joint and the epoxy-polycarbonate joint remain firm when exposed to temperatures in excess of 200° F.
Claim 2
Dependent Claim
68 words
An autoclavable needle comprising: a metal cannula; an epoxy capable of firmly bonding at temperatures in excess of 200° F., which epoxy is permanently secured to the cannula; and permanently secured to this epoxy is a transparent polycarbonate hub having a deflection temperature in excess of 200° F., whereby both the metal-epoxy joint and the epoxy-polycarbonate joint remain firm when exposed to temperatures in excess of 200° F.
Claim 3
Dependent Claim
30 words
A needle as set forth in claim 1, wherein the cannula is secured to the hub with an adhesive that is heat curable at temperatures in excess of 200° F.
Claim 4
Dependent Claim
19 words
A needle as set forth in claim 1, wherein the hub has a light transmission of at least 80%.
Claim 5
Dependent Claim
13 words
A needle as set forth in claim 1, wherein the hub is polycarbonate.
Claim 6
Dependent Claim
74 words
An autoclavable needle comprising: a metal cannula; a transparent polycarbonate hub having a deflection temperature in the range of 240° to 290° F.; a high temperature epoxy permanently securing together the cannula and hub, which epoxy is capable of firmly bonding at temperatures in the range of 240° to 290° F., whereby both the metal-epoxy joint and the epoxy-polycarbonate joint remain firm when exposed to temperatures in the range of 240° to 290° F.
Claim 7
Dependent Claim
74 words
An autoclavable needle comprising: a metal cannula; a transparent polycarbonate hub having a deflection temperature in the range of 240° to 290° F.; a high temperature epoxy permanently securing together the cannula and hub, which epoxy is capable of firmly bonding at temperatures in the range of 240° to 290° F., whereby both the metal-epoxy joint and the epoxy-polycarbonate joint remain firm when exposed to temperatures in the range of 240° to 290° F.
Claim 8
Dependent Claim
23 words
A needle as set forth in claim 5, wherein the needle is autoclavable at temperatures of 240° to 260° F. without substantial distortion.
Claim 9
Dependent Claim
41 words
A needle as set forth in claim 5, wherein the polycarbonate hub has an internally tapered section adapted to wedgingly fit on an externally tapered adapter of a syringe and withstands the normal stresses of such wedged joint without substantial crazing.
References Cited (Backward Citations)
US3093134A
Cited
US3186408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |