US3591460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and means for handling cells
Assignee: Individual
•
Filing: 1967-08-30
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Granted: 1971-07-06
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Expires: 1987-08-30
Abstract
Abstract A FUNNEL-SHAPED CHAMBER APPARATUS IS PROVIDED FOR PASSAGE THERETHROUGH OF UPWARDLY FLOWING FLUID MEDIUM ADAPTED FOR THE MAINTENANCE AND/OR GROWTH OF LIVING CELLS IN SUSPENSION. IN USE, THE MEDIUM AND THE CELLS ARE INTRODUCED INTO THE CHAMBER AND FRESH MEDIUM IS PUT IN AT A CONTINUOUS RATE AT LEAST SUFFICIENT TO KEEP THE CELLS SUSPENDED. THE LIVING CELL POPULATION DISTRIBUTES ACCORDING TO SIZE VERTICALLY IN THE CHAMBER (OR SERIES OF SUCCESSIVELY LARGER CHAMBERS) AND THUS CAN BE FRACTIONATED FOR SIZE. ALSO, BACTERIA, VIRUSES AND OTHER MICROBIOLOGICAL ENTITIES AS DESIRED CAN BE CONTINUOUSLY CULTIVATED ON THE LIVING CELLS FOR HARVESTING EITHER INTERMITTENTLY OR CONTINUOUSLY.
Inventors
- 👤 David F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/02; C12M23/08; C12M23/58; C12M41/00; C12M41/12; C12M41/18; C12M41/22; C12M47/00; C12M47/04
Claims Analysis
Total Claims: 0
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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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |