Patent US4414197A successfully refreshed from Google Patents.
US4414197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing permanent slides of rare sorted cells
Assignee: OTHO DIAGNOSTIC SYSTEMS Inc
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Filing: 1982-03-19
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Granted: 1983-11-08
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Expires: 2002-03-19
Abstract
Abstract Methods and apparatus wherein a very small number of sorted cells are attached to specified locations on a microscope slide circumscribed by well areas of a retainer slip. The cells are deposited in the wells and during centrifugation of the slide-retainer sandwich, are contacted with and attached to the serum albumin present in the well and coated on the slide. Removal of excess fluids, optional clamping means and the retainer slip followed by air drying provides for permanent attachment of rare, sorted cells in a localized, known area for subsequent staining, examination and analysis.
Inventors
- 👤 Richard A. Dussault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:31
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G02; G02B; G02B21/00; G02B21/34; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
A method for preparing permanent slides of rare sorted cells present in a suspending solution comprising the steps o: (a) providing a microscope slide; (b) further providing means for retaining cells, said retainer means having at least one well; (c) coating one side of both the microscope slide and the retainer means with an effective amount of serum albumin for substantially sealing capillary passages between the slide and retainer means; (d) contacting together the coated sides of the microscope slide and retainer means to form a slide-retainer means sandwich; (e) partially filling the well with an effective amount of serum albumin for retaining the cells in the well; (f) depositing the sorted cells into the well; (g) centrifuging the slide-retainer means sandwich whereby the cells are contacted with and retained by the serum albumin; and (h) removing the retainer means and excess suspending solution.
Claim 2
Independent Claim
144 words
A method for preparing permanent slides of rare sorted cells present in a suspending solution comprising the steps o: (a) providing a microscope slide; (b) further providing means for retaining cells, said retainer means having at least one well; (c) coating one side of both the microscope slide and the retainer means with an effective amount of serum albumin for substantially sealing capillary passages between the slide and retainer means; (d) contacting together the coated sides of the microscope slide and retainer means to form a slide-retainer means sandwich; (e) partially filling the well with an effective amount of serum albumin for retaining the cells in the well; (f) depositing the sorted cells into the well; (g) centrifuging the slide-retainer means sandwich whereby the cells are contacted with and retained by the serum albumin; and (h) removing the retainer means and excess suspending solution.
Claim 3
Dependent Claim
35 words
The method as described in claim 1 wherein the contacting step further comprises: holding the slide and retainer means together with means for clamping, and the removing step further includes removing the means for clamping.
Claim 4
Dependent Claim
25 words
The method as described in claim 2 wherein removing excess suspending solution comprises: siphoning excess suspending solution by capillary action and drying the microscope slide.
Claim 5
Dependent Claim
17 words
The method as described in claim 1 or 3 wherein the serum albumin is bovine serum albumin.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |