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US4756974A
Expired / Lapsed
US
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Elastomeric component for pharmaceutical devices
Assignee: West Pharmaceutical Services Inc
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Filing: 1986-11-10
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Granted: 1988-07-12
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Expires: 2006-11-10
Abstract
Abstract A stopper device for use on a pharmaceutical closure, comprising an elastomeric stopper sized to function as a closure; and a polyurethane coating on the stopper. The coating has a modulus sufficient to decrease the coefficient of friction of the stopper to less than 0.6.
Inventors
- 👤 Val G. Romberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:32
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/0052; B65D39/0058; B65D2539/00; B65D2539/001; B65D2539/008; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31569
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
A stopper device for use on a pharmaceutical closure, comprising: an elastomeric stopper sized to function as a closure; and a polyurethane coating on said stopper, said coating having a modulus sufficient to decrease the coefficient of friction of said stopper to less than 0.6.
Claim 2
Dependent Claim
45 words
A stopper device for use on a pharmaceutical closure, comprising: an elastomeric stopper sized to function as a closure; and a polyurethane coating on said stopper, said coating having a modulus sufficient to decrease the coefficient of friction of said stopper to less than 0.6.
Claim 3
Dependent Claim
17 words
The device of claim 1, wherein said coefficient of friction ranges from about 0.35 to about 0.45.
Claim 4
Dependent Claim
17 words
The device of claim 1, wherein said polyurethane coating has been crosslinked after application on said stopper.
Claim 5
Dependent Claim
13 words
The device of claim 3, wherein said polyurethane is a water soluble polyurethane.
Claim 6
Dependent Claim
15 words
The device of claim 1, wherein said modulus ranges from 1000 psi to 5000 psi.
Claim 7
Dependent Claim
14 words
The device of claim 1, wherein said coating thickness is at least 0.2 mil.
Claim 8
Dependent Claim
14 words
The device of claim 6, wherein said coating ranges from 0.2 to 1.5 mil.
Claim 9
Dependent Claim
73 words
A stopper device for use on a pharmaceutical closure, comprising: an elastomeric stopper sized to fit said closure and having a coefficient of friction of at least 1.2 and a water soluble crosslinked polyurethane coating on said stopper, said coating having a modulus between 1000 psi and 5000 psi and a thickness of from about 0.4 to 1.5 mil, to decrease the coefficient of friction of said stopper to between 0.45 and 0.60.
Claim 10
Dependent Claim
73 words
A stopper device for use on a pharmaceutical closure, comprising: an elastomeric stopper sized to fit said closure and having a coefficient of friction of at least 1.2 and a water soluble crosslinked polyurethane coating on said stopper, said coating having a modulus between 1000 psi and 5000 psi and a thickness of from about 0.4 to 1.5 mil, to decrease the coefficient of friction of said stopper to between 0.45 and 0.60.
Claim 11
Dependent Claim
45 words
An elastomeric component for use in a pharmaceutical device, comprising: an elastomeric part sized to function as said component; and a polyurethane coating on said part, said coating having a modulus sufficient to decrease the coefficient of friction of said part to less than 0.60.
Claim 12
Dependent Claim
45 words
An elastomeric component for use in a pharmaceutical device, comprising: an elastomeric part sized to function as said component; and a polyurethane coating on said part, said coating having a modulus sufficient to decrease the coefficient of friction of said part to less than 0.60.
Claim 13
Dependent Claim
17 words
The device of claim 9, wherein said coefficient of friction ranges from about 0.35 to about 0.45.
Claim 14
Dependent Claim
17 words
The device of claim 9, wherein said polyurethane coating has been crosslinked after application on said part.
Claim 15
Dependent Claim
13 words
The device of claim 11, wherein said polyurethane is a water soluble polyurethane.
Claim 16
Dependent Claim
14 words
The device of claim 9, wherein said modulus ranges from 1000 to 5000 psi.
Claim 17
Dependent Claim
14 words
The device of claim 9, wherein said coating thickness is at least 0.4 mil.
Claim 18
Dependent Claim
14 words
The device of claim 14, wherein said coating ranges from 0.2 to 1.5 mil.
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) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |