Patent US4973504A successfully refreshed from Google Patents.
US4973504A
Expired / Lapsed
US
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Pharmaceutical elastomeric coating
Assignee: West Pharmaceutical Services Inc
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Filing: 1988-11-07
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Granted: 1990-11-27
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Expires: 2008-11-07
Abstract
Abstract An elastomeric member for use with a container and in contact with pharmaceutically pure contents therein. The elastomeric member has an elastomeric base and a continuous polyparaxylylene coating on the base. The coating ranges from about 0.5 microns to about 2.0 microns in thickness. The closure member has a coefficient of friction of less than 1.0 and is capable of substantially preventing metal extraction from said elastomers.
Inventors
- 👤 Val G. Romberg
- 👤 Patty H. Kiang
- 👤 Wayne T. Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:22
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31511; A61M5/31513; B; B65; B65D; B65D39/00; B65D39/0005; B65D39/0011; B65D39/0052; B65D39/0058; B65D39/007; B65D39/0076; B65D51/00; B65D51/002; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/046; C09; C09D; C09D165/00; C09D165/04; A61M2207/00; B65D2539/00; B65D2539/001; B65D2539/003; B65D2539/008; C08J2321/00; C08J2465/00; Y; Y10; Y10S; Y10S220/00; Y10S220/19; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31837; Y10T428/31855; Y10T428/31909; Y10T428/31924; Y10T428/31931
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
An elastomeric member for use with a container and in contact with pharmaceutically pure contents therein, comprising an elastomeric base and continuous polyparaxylylene coating on said base to reduce the coefficient of friction of said member to less than 1.0 and substantially prevent metal ion extractions from said base, said coating ranging from about 0.5 microns to about 2.0 microns in thickness.
Claim 2
Dependent Claim
62 words
An elastomeric member for use with a container and in contact with pharmaceutically pure contents therein, comprising an elastomeric base and continuous polyparaxylylene coating on said base to reduce the coefficient of friction of said member to less than 1.0 and substantially prevent metal ion extractions from said base, said coating ranging from about 0.5 microns to about 2.0 microns in thickness.
Claim 3
Dependent Claim
14 words
The product of claim 1, wherein said coefficient of friction is less than 0.5.
Claim 4
Dependent Claim
30 words
The product of claim 1, wherein said extraction is at least 50 fold less calcium ion at 1 hour of autoclaving in 1 molar hydrochloric acid than an uncoated member.
Claim 5
Dependent Claim
29 words
The product of claim 1, wherein said extraction is at least 50 fold less aluminum in 1 hour of autoclaving in 1 molar hydrochloric acid than an uncoated member.
Claim 6
Dependent Claim
28 words
The product of claim 1, wherein said extraction is at least 50 fold less zinc at 1 hour autoclaving in 1 molar hydrochloric acid than an uncoated member.
Claim 7
Dependent Claim
15 words
The product of claim 1, which further includes a container with pharmaceutically pure contents therein.
Claim 8
Dependent Claim
23 words
The product of claim 1, wherein said member is selected from plunger tips, sleeve stoppers, seals, flashback bulbs tops or baby bottle nipples.
Claim 9
Dependent Claim
57 words
A baby bottle nipple formed from an elastomeric member, comprising an elastomeric base and a continuous polyparaxylylene coating on said base to substantially prevent metal ion extraction from said base, said coating increasing the tensile strength over an uncoated base without increasing the hardness, said coating ranging from about 0.5 microns to about 2.0 microns in thickness.
Claim 10
Dependent Claim
57 words
A baby bottle nipple formed from an elastomeric member, comprising an elastomeric base and a continuous polyparaxylylene coating on said base to substantially prevent metal ion extraction from said base, said coating increasing the tensile strength over an uncoated base without increasing the hardness, said coating ranging from about 0.5 microns to about 2.0 microns in thickness.
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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) | 1993-11-26 | 1994-05-28 | 1994-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-26 | 1998-05-28 | 1998-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-26 | 2002-05-28 | 2002-11-27 | $7700.00 | Window Closed / Lapsed |