US4335718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle cannula
Assignee: Becton Dickinson and Co
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Filing: 1980-10-02
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Granted: 1982-06-22
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Expires: 2000-10-02
Abstract
Abstract A needle cannula comprises a hollow tubular member having a first portion and a second portion terminating in a sharp point. The outside diameter of the second portion is less than the outside diameter of the first portion, while the inside diameter of the second portion is not less than the inside diameter of the first portion.
Inventors
- 👤 Frank B. Calabrese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:39
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/158; A61M5/178; A61M5/31; A61M5/32; A61M5/3286
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
A needle cannula for the conveyance of liquid therethrough comprising: an elongate, hollow, substantially cylindrical barrel having a proximal portion and a distal portion terminating in a sharp point for the penetration of skin, said distal portion having an outside diameter less than the outside diameter of said proximal portion, the inside diameter of said distal portion being greater than the inside diameter of said proximal portion.
Claim 2
Dependent Claim
67 words
A needle cannula for the conveyance of liquid therethrough comprising: an elongate, hollow, substantially cylindrical barrel having a proximal portion and a distal portion terminating in a sharp point for the penetration of skin, said distal portion having an outside diameter less than the outside diameter of said proximal portion, the inside diameter of said distal portion being greater than the inside diameter of said proximal portion.
Claim 3
Dependent Claim
21 words
The needle cannula of claim 1 wherein the transition surface between the outside diameters of proximal and distal portions is tapered.
Claim 4
Dependent Claim
21 words
The needle cannula of claim 1 wherein the transition surface between the inside diameters of proximal and distal portions is tapered.
Claim 5
Dependent Claim
17 words
The needle cannula of claim 1 wherein said point is angled to form a leading sharp edge.
Claim 6
Dependent Claim
13 words
The needle cannula of claim 1 wherein said barrel is made of metal.
Claim 7
Dependent Claim
14 words
The needle cannula of claim 5 wherein said metal is medical grade stainless steel.
Claim 8
Dependent Claim
19 words
The needle cannula of claim 1 wherein the distal portion is a minority portion of the entire needle cannula.
Claim 9
Dependent Claim
89 words
A needle cannula for the conveyance of a liquid therethrough comprising: an elongate, hollow, substantially cylindrical metal barrel having a proximal portion and a distal portion terminating in an angled sharp point for the penetration of skin, said distal portion having an outside diameter less than the outside diameter of said proximal portion with a tapered transition surface between said respective outside diameters, said distal portion having an inside diameter greater than the inside diameter of said proximal portion with a tapered transition surface between said respective inside diameters.
Claim 10
Dependent Claim
89 words
A needle cannula for the conveyance of a liquid therethrough comprising: an elongate, hollow, substantially cylindrical metal barrel having a proximal portion and a distal portion terminating in an angled sharp point for the penetration of skin, said distal portion having an outside diameter less than the outside diameter of said proximal portion with a tapered transition surface between said respective outside diameters, said distal portion having an inside diameter greater than the inside diameter of said proximal portion with a tapered transition surface between said respective inside diameters.
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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |