Patent US3653528A successfully refreshed from Google Patents.
US3653528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopper for medicament flasks
Assignee: West Pharmaceutical Services Inc
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Filing: 1970-03-03
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Granted: 1972-04-04
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Expires: 1990-03-03
Abstract
Abstract A stopper adapted to be held in place in an opening in a container by means of an outer cap member comprising a disc-like top portion having an enlarged outer annular wall section and an inner radial wall section of smaller cross section than the outer wall, means defining at least one indentation in the outer surface of the top portion adapted to be pierced by a hypodermic needle or the like.
Inventors
- 👤 Hans Wimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:21
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/002; Y; Y10; Y10S; Y10S215/00; Y10S215/03
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
A stopper and cap member assembly adapted to be assembled to a container so that the stopper overlies the opening in the container, said stopper being of a resilient material and consisting of an outer annular portion and a central section connected by a wall portion, said cap member having a generally cylindrical skirt portion having at one end an inwardly directed annular disc-like top and means at its opposite end for securing the cap member to the container, the disc-like top forming an opening exposing the central section of the stopper, the outer annular portion of the stopper being under compression between the top of the cap and portion of the container adjacent the opening therein, means defining an arcuate indentation in the central portion of the stopper in the face thereof exposed through the opening in the cap member, the apex of the indentation being disposed below a plane through the inner surface of the wall portion connecting the outer annular poRtion to the central section.
Claim 2
Dependent Claim
168 words
A stopper and cap member assembly adapted to be assembled to a container so that the stopper overlies the opening in the container, said stopper being of a resilient material and consisting of an outer annular portion and a central section connected by a wall portion, said cap member having a generally cylindrical skirt portion having at one end an inwardly directed annular disc-like top and means at its opposite end for securing the cap member to the container, the disc-like top forming an opening exposing the central section of the stopper, the outer annular portion of the stopper being under compression between the top of the cap and portion of the container adjacent the opening therein, means defining an arcuate indentation in the central portion of the stopper in the face thereof exposed through the opening in the cap member, the apex of the indentation being disposed below a plane through the inner surface of the wall portion connecting the outer annular poRtion to the central section.
Claim 3
Dependent Claim
18 words
The assembly as claimed in claim 1 wherein the indentation is hemispherical and is disposed generally centrally thereof.
Claim 4
Dependent Claim
16 words
The assembly as claimed in claim 1 wherein the top wall is of substantially uniform thickness.
Claim 5
Dependent Claim
35 words
The assembly as claimed in claim 1 wherein said indentation is conical and the outer surface defining the conical indentation is tapered at an angle of about 53* to a perpendicular plane through the apex.
Claim 6
Dependent Claim
39 words
The assembly as claimed in claim 4 wherein the inner conical wall is disposed at an angle of about 37* relative to a surface of revolution through the juncture of the inner conical wall and the inner radial wall.
Claim 7
Dependent Claim
20 words
The assembly as claimed in claim 1 including a plurality of raised lugs on the surface of the top portion.
Claim 8
Dependent Claim
21 words
The assembly as claimed in claim 1 wherein there are four indentations disposed in a circular array equi-spaced from one another.
Claim 9
Dependent Claim
54 words
The assembly as claimed in claim 7 including means defining an annular groove in the bottom face of said top wall circumscribing said indentations and wherein the lower edge of said groove lies in a plane closer to the outer face of the top wall than a plane through the apex of said indentations.
Claim 10
Dependent Claim
33 words
The assembly as claimed in claim 1 including means defining an annular recess in the lower face of the connecting wall portion of the stopper between the outer annular portion and central section.
References Cited (Backward Citations)
US837408A
Cited
US2783909A
Cited
US2782958A
Cited
FR1202433A
Cited
US3136440A
Cited
US3233771A
Cited
US3392859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |