US3834874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of malarial parasites in blood
Assignee: General Electric Co
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Filing: 1972-10-18
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Granted: 1974-09-10
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Expires: 1992-10-18
Abstract
Abstract PRE-STAINED MICROSCOPE SLIDES HAVING A SURFACE COVERED WITH A DRIED MIXTURE OF METHYLENE BLUE NN (ALSO KNOWN AS NEW METHYLENE BLUE N) AND CRESYL VIOLET ACETATE, DISCLOSED IN A COPENDING APPLICATION AS USEFUL FOR OBSERVING NORMAL BLOOD CONSTITUENTS, ARE EMPLOYED TO OBSERVE SAMPLES OF BLOOD FROM PATIENTS SUFFERING FROM FALCIPARUM MALARIA. TROPHOZOITES AND GAMETOCYTES ARE RENDERED READILY OBSERVABLE AND IDENTIFIABLE; PERSONNEL EXPERIENCED IN MALARIAL-ORIENTED HEMATOLOGY FOUND THE PARASITES IN SUCH PREPARATIONS AT LEAST READILY OBSERVABLE AS IN THE CONVENTIONAL WRIGHT-STAINED PREPARATION.
Inventors
- 👤 S Gottlieb
- 👤 J Geating
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:52
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/02; C12Q1/04; Y; Y02; Y02A; Y02A50/00; Y02A50/30
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |