US3715047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone stopper for a sterile container
Assignee: Shin-Etsu Chemical Co Ltd
•
Filing: 1970-07-28
•
Granted: 1973-02-06
•
Expires: 1990-07-28
Abstract
Abstract An otherwise closed sterile container is closed by inserting into the mouth thereof a removable plug. The plug is of silicone rubber having an open cell cellular structure. Sterility of the container is maintained. Moisture evaporation therefrom is reduced.
Inventors
- 👤 R Sado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:26
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01L3/50825; C; C12; C12M; C12M23/00; C12M23/38
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
44 words
A plug for maintaining sterility and reducing moisture evaporation from an otherwise closed sterile container having a mouth, saiD plug being adapted for removable insertion into said mouth to close same, said plug being comprised of silicone rubber having an open cell cellular structure.
Claim 2
Dependent Claim
44 words
A plug for maintaining sterility and reducing moisture evaporation from an otherwise closed sterile container having a mouth, saiD plug being adapted for removable insertion into said mouth to close same, said plug being comprised of silicone rubber having an open cell cellular structure.
Claim 3
Dependent Claim
22 words
The plug as claimed in claim 1 wherein said silicone rubber is obtained by mechanical process from a closed cell cellular material.
Claim 4
Dependent Claim
17 words
The plug as claimed in claim 1 wherein said plug has an exterior surface which is smooth.
Claim 5
Dependent Claim
30 words
The plug as claimed in claim 3 wherein said plug has an exterior surface which is uneven whereby removal of the inserted plug from said mouth is rendered more difficult.
Claim 6
Dependent Claim
14 words
The plug as claimed in claim 1 wherein said container contains a microbe culture.
Claim 7
Dependent Claim
15 words
The plug as claimed in claim 1 wherein said container is an animal rearing chamber.
References Cited (Backward Citations)
US3118557A
Cited
US2978134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |