US2747334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cultivation of plant tissue
Assignee: Pfizer Inc
•
Filing: 1952-05-20
•
Granted: 1956-05-29
•
Expires: 1972-05-20
Abstract
No abstract record available.
Inventors
- 👤 John B Routien
- 👤 Louis G Nickell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
A; A01; A01H; A01H4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR THE PRODUCTION OF FINELY DIVIDED MASS ES OF PLANT CELL, WHICH COMPRISES INOCULATING A NUTRIENT AQUEOUS MEDIUM WITH VIGOROUSLY GROWING, UNDIFFERENTIATED PLANT CELLS FROM PLANTS CLASSIFIED ABOVE THE THALLOPHYTES IN SYSTEMATIC BOTANY, AND MAINTAINING SAID PLANT CELLS UNDER CONDITIONS OF SUBMERGED, AGITATED AECATION IN IN THE PRESENCE OF EMBROYONIC-TYPE CELL GROWTH STIMULANT.
Claim 2
Dependent Claim
55 words
A PROCESS FOR THE PRODUCTION OF FINELY DIVIDED MASS ES OF PLANT CELL, WHICH COMPRISES INOCULATING A NUTRIENT AQUEOUS MEDIUM WITH VIGOROUSLY GROWING, UNDIFFERENTIATED PLANT CELLS FROM PLANTS CLASSIFIED ABOVE THE THALLOPHYTES IN SYSTEMATIC BOTANY, AND MAINTAINING SAID PLANT CELLS UNDER CONDITIONS OF SUBMERGED, AGITATED AECATION IN IN THE PRESENCE OF EMBROYONIC-TYPE CELL GROWTH STIMULANT.
References Cited (Backward Citations)
US2258291A
Cited
US2198150A
Cited
US2423873A
Cited
US2479295A
Cited
US2522409A
Cited
US2550701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |