Patent US4299921A successfully refreshed from Google Patents.
US4299921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prolonged incubation microbiological apparatus and filter gaskets thereof
Assignee: Individual
•
Filing: 1980-08-21
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Granted: 1981-11-10
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Expires: 2000-08-21
Abstract
Abstract Apparatus for the culture of aerobic, anaerobic organisms and tissue which is formed of two sections, one fitting with the other as a cover and has a lubricated open cell foam filter gasket having on one side a microporous membrane and on the other, a non-porous layer. The gasket is fitted to the cover section or onto the rim of the container section and minimizes the chances of contamination from the ambient or otherwise gaseous atmosphere of incubation of the culture or biological material contained therein when closed and/or in use.
Inventors
- 👤 Kamal A. Youssef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:50
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/02; C12M23/10; C12M23/24; C12M29/00; C12M29/04; Y; Y10; Y10S; Y10S277/00; Y10S277/918; Y10S277/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
An apparatus for the culture of aerobic or anaerobic organisms or tissue, comprising a dish member having an upstanding periphal wall and a cover provided with a downturned rim fitting over at least a part of said wall; a filter gasket for sealing the juncture between said wall, said cover and said rim, comprising a compressible open-called core, a microporous air permeable and particulate impermeable membrane on one side of said core adapted to adhere to the inside of said cover and to its rim, said core having on its other side a non-porous layer adapted to adhere to the cover of said dish; said gasket having also an external, substantially microscopic lubricating film to ensure sealing engagement between said dish and said cover.
Claim 2
Independent Claim
124 words
An apparatus for the culture of aerobic or anaerobic organisms or tissue, comprising a dish member having an upstanding periphal wall and a cover provided with a downturned rim fitting over at least a part of said wall; a filter gasket for sealing the juncture between said wall, said cover and said rim, comprising a compressible open-called core, a microporous air permeable and particulate impermeable membrane on one side of said core adapted to adhere to the inside of said cover and to its rim, said core having on its other side a non-porous layer adapted to adhere to the cover of said dish; said gasket having also an external, substantially microscopic lubricating film to ensure sealing engagement between said dish and said cover.
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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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |