Patent US4808453A successfully refreshed from Google Patents.
US4808453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pharmaceutical elastomeric coating
Assignee: West Pharmaceutical Services Inc
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Filing: 1987-04-13
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Granted: 1989-02-28
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Expires: 2007-04-13
Abstract
Abstract A closure for use with a container with pharmaceutically pure contents therein. The elastomeric closure 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
2026-11-05 20:05
CPC Classifications
B; B67; B67B; B67B7/00; B67B7/92; B65; B65D; B65D39/00; B65D39/0005; B65D39/0011; B65D39/0052; B65D39/0058; B65D39/007; B65D39/0076; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/046; C09; C09D; C09D165/00; C09D165/04; 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: 7
Claim 1
Independent Claim
60 words
An elastomeric stopper for use with a container with pharmaceutically pure contents therein comprising an elastomeric base and a continuous polyparaxylylene coating on said base to reduce the coefficient of friction of said stopper 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
60 words
An elastomeric stopper for use with a container with pharmaceutically pure contents therein comprising an elastomeric base and a continuous polyparaxylylene coating on said base to reduce the coefficient of friction of said stopper 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 stopper.
Claim 5
Dependent Claim
30 words
The product of claim 1, wherein said extraction is at least 50 fold less aluminum ion in 1 hour of autoclaving in 1 molar hydrochloric acid than an uncoated stopper.
Claim 6
Dependent Claim
29 words
The product of claim 1, wherein said extraction is at least 50 fold less zinc ion at 1 hour autoclaving in 1 molar hydrochloric acid than an uncoated stopper.
Claim 7
Dependent Claim
15 words
The product of claim 1, which further includes a container with pharmaceutically pure contents therein.
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) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |