US3970427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing sticking of blood cells to glass in blood testing procedures
Assignee: Baxter Healthcare Corp
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Filing: 1973-03-22
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Granted: 1976-07-20
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Expires: 1993-03-22
Abstract
Abstract Blood Cells are suspended in a physiological saline solution modified by the addition of a small amount of gelatin. The presence of gelatin serves to reduce attractive forces between the blood cells and glass surfaces in testing procedures.
Inventors
- 👤 Vito M. Esposito
- 👤 Stanley B. Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:32
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/96; A; A61; A61K; A61K47/00; A61K47/30; A61K47/42; Y; Y10; Y10T; Y10T436/00; Y10T436/25
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
A blood testing procedure in which blood cells are disposed in close relation to glass surfaces, comprising the step of suspending said cells in a sterile physiological saline solution containing gelatin in a concentration range of approximately 0.001 to 2.0 percent, said gelatin being effective to reduce attraction forces between said blood cells and said glass surfaces.
Claim 2
Dependent Claim
57 words
A blood testing procedure in which blood cells are disposed in close relation to glass surfaces, comprising the step of suspending said cells in a sterile physiological saline solution containing gelatin in a concentration range of approximately 0.001 to 2.0 percent, said gelatin being effective to reduce attraction forces between said blood cells and said glass surfaces.
Claim 3
Dependent Claim
57 words
A blood testing procedure in which blood cells are disposed in close relation to glass surfaces, comprising the step of suspending said cells in a sterile physiological saline solution containing gelatin in a concentration range of approximately 0.001 to 1.0 percent, said gelatin being effective to reduce attraction forces between said blood cells and said glass surfaces.
Claim 4
Dependent Claim
57 words
A blood testing procedure in which blood cells are disposed in close relation to glass surfaces, comprising the step of suspending said cells in a sterile physiological saline solution containing gelatin in a concentration range of approximately 0.001 to 1.0 percent, said gelatin being effective to reduce attraction forces between said blood cells and said glass surfaces.
Claim 5
Dependent Claim
15 words
The procedure of claim 2 in which the concentration of gelatin is approximately 0.1 percent.
References Cited (Backward Citations)
US3677710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |