US4871674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Culture cell
Assignee: Kurashiki Spinning Co Ltd
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Filing: 1988-10-11
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Granted: 1989-10-03
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Expires: 2008-10-11
Abstract
Abstract A culture cell having discontinuous projecting parts for hanging the culture cell on an upper circumferential portion and a membrane filter on a bottom portion, characterized in that triangular tapered ribs are provided continuously underneath the discontinuous projecting parts.
Inventors
- 👤 Shigeaki Matsui
- 👤 Eiichi Hirai
- 👤 Junji Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:45
CPC Classifications
C; C12; C12M; C12M25/00; C12M25/02; C12M25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A culture cell comprising; (a) a hollow chamber, having a top and a bottom, wherein the bottom of said chamber is formed by the attachment of a membrane filter, (b) a plurality of discontinuous projections extending radially outward from the top of said chamber beyond a sidewall of the chamber, (c) each said projection having attached to the bottom of the projection in an outwardly radially extending right triangular rib, each said rib being attached at the radially innermost end thereof to said chamber, each said rib being further oriented such that the right angled corner of said right triangular rib abuts the point of contact of said projection with said chamber.
Claim 2
Dependent Claim
112 words
A culture cell comprising; (a) a hollow chamber, having a top and a bottom, wherein the bottom of said chamber is formed by the attachment of a membrane filter, (b) a plurality of discontinuous projections extending radially outward from the top of said chamber beyond a sidewall of the chamber, (c) each said projection having attached to the bottom of the projection in an outwardly radially extending right triangular rib, each said rib being attached at the radially innermost end thereof to said chamber, each said rib being further oriented such that the right angled corner of said right triangular rib abuts the point of contact of said projection with said chamber.
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) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |