US6015398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe needle coated with polyorganosiloxanes
Assignee: Nissho Corp
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Filing: 1998-05-12
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Granted: 2000-01-18
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Expires: 2018-05-12
Abstract
Abstract A needle which has decreased piercing resistance, which resistance does not increase by repeated piercing and of which a sterilizing means is not limited, is provided by the present invention. The needle is coated on its outside surface with a mixture of (1) a polyorganosiloxane having amino groups at both terminal ends reacted with an alkoxysilane having epoxy groups and (2) a non-reactive polyorganosiloxane which has a lower average degree of polymerization of its siloxane part than that of polyorganosiloxane (1).
Inventors
- 👤 Yoshikazu Arimatsu
- 👤 Takeshi Nizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:22
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; C09D183/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A coated syringe needle comprising a syringe needle coated on its surface with a mixture of: (1) a first polyorganosiloxane selected from the group consisting of (i) a reaction product of (a) a polyorganosiloxane having amino groups at both terminal ends and alkoxysilyl groups with (b) an epoxy group-containing alkoxysilane and (ii) a reaction product of (a) a polyorganosiloxane having silanol groups with (b) another reaction product of an organosiloxane having amino groups at terminal ends with an epoxy group-containing alkoxysilane and (2) a second non-reactive polyorganosiloxane, said second polyorganosiloxane having a lower average degree of polymerization of siloxane part than that of said first polyorganosiloxane.
Claim 2
Dependent Claim
106 words
A coated syringe needle comprising a syringe needle coated on its surface with a mixture of: (1) a first polyorganosiloxane selected from the group consisting of (i) a reaction product of (a) a polyorganosiloxane having amino groups at both terminal ends and alkoxysilyl groups with (b) an epoxy group-containing alkoxysilane and (ii) a reaction product of (a) a polyorganosiloxane having silanol groups with (b) another reaction product of an organosiloxane having amino groups at terminal ends with an epoxy group-containing alkoxysilane and (2) a second non-reactive polyorganosiloxane, said second polyorganosiloxane having a lower average degree of polymerization of siloxane part than that of said first polyorganosiloxane.
Claim 3
Dependent Claim
23 words
A coated syringe needle according to claim 1, wherein the average degree of polymerization of siloxane part of said polyorganosiloxane (1) is 10˜10,000.
Claim 4
Dependent Claim
30 words
A coated syringe needle according to claim 1, wherein the amount of said non-reactive polyorganosiloxane (2) in said mixture is 1/10˜7/10 by weight of the amount of the polyorganosiloxane (1).
Claim 5
Dependent Claim
30 words
A coated syringe needle according to claim 2, wherein the amount of said non-reactive polyorganosiloxane (2) in said mixture is 1/10˜7/10 by weight of the amount of the polyorganosiloxane (1).
Claim 6
Dependent Claim
16 words
A coated syringe needle according to claim 1, wherein the epoxy group-containing alkoxysilane is γ-glycidoxypropylmethyl dimethoxysilane.
Claim 7
Dependent Claim
14 words
A coated syringe needle according to claim 1, wherein the second polyorganosiloxane is polydimethylsiloxane.
Claim 8
Dependent Claim
39 words
A coated syringe needle according to claim 1, wherein the polyorganosiloxane having amino groups at both terminal ends and alkoxysilyl groups of the reaction product (i) is a polydimethylsiloxane having amino groups at both terminal ends and methoxysilyl groups.
Claim 9
Dependent Claim
29 words
A coated syringe needle according to claim 1, wherein the polyorganosiloxane having silanol groups of the reaction product (ii) is a polydimethylsiloxane having silanol groups at both terminal end.
Claim 10
Dependent Claim
24 words
A coated syringe needle according to claim 1, wherein the organosiloxane having amino groups at terminal ends of the reaction product (ii) is γ-aminopropyltriethoxysilane.
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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) | 2003-01-17 | 2003-07-19 | 2004-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-17 | 2007-07-19 | 2008-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-17 | 2011-07-19 | 2012-01-18 | $7700.00 | Window Closed / Lapsed |