US3717551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cell culture
Assignee: Individual
•
Filing: 1970-07-02
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Granted: 1973-02-20
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Expires: 1990-07-02
Abstract
Abstract A method for the culture of cells of the type which grow in films and substantially in monolayers, the method being intended to be employed for virus production, the cells to be cultivated being fixed on porous silica spherules which are maintained in suspension in the culture medium.
Inventors
- 👤 J Chermann
- 👤 C Jasmin
- 👤 M Raynaud
- 👤 B Bizzini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:21
CPC Classifications
C; C12; C12N; C12N7/00; A; A61; A61K; A61K39/00; C12N2531/00; C12N2533/00; C12N2533/10; C12N2740/00; C12N2740/00011; C12N2740/10011; C12N2740/13011; C12N2740/13051; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A method of culture of cells intended for virus production and of the type which grow in a monolayer film, wherein the cells to be cultivated are fixed on porous silica spherules, having diameters of about 125 microns, which are maintained in suspension in the culture medium, the mean diameter of the pores of said spherules being within the 100 - 1350 A-range.
Claim 2
Independent Claim
63 words
A method of culture of cells intended for virus production and of the type which grow in a monolayer film, wherein the cells to be cultivated are fixed on porous silica spherules, having diameters of about 125 microns, which are maintained in suspension in the culture medium, the mean diameter of the pores of said spherules being within the 100 - 1350 A-range.
References Cited (Backward Citations)
US3493651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |