US4999297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Culture of cells
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1986-05-30
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Granted: 1991-03-12
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Expires: 2006-05-30
Abstract
Abstract Cells such as mammalian cells are cultivated on a bed of a solid material whose surface is formed of a specific polymer or copolymer of an amino acid, i.e. a poly(methionine) or a copolymer of gamma -benzyl glutamate.
Inventors
- 👤 Norihiko Minoura
- 👤 Seiichi Aiba
- 👤 Yukihiko Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:03
CPC Classifications
C; C12; C12N; C12N5/00; C12N5/0068; C12N2533/00; C12N2533/10; C12N2533/12; C12N2533/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A method for culturing animal cells for multiplication comprising culturing animal cells on a cell adherent polymethionine surface in a culture medium.
Claim 2
Independent Claim
22 words
A method for culturing animal cells for multiplication comprising culturing animal cells on a cell adherent polymethionine surface in a culture medium.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-11 | 1994-09-10 | 1995-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-11 | 1998-09-10 | 1999-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-11 | 2002-09-10 | 2003-03-12 | $7700.00 | Window Closed / Lapsed |