US2664403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing hemating standardized reagent
Assignee: A S ALOE Co
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Filing: 1951-06-25
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Granted: 1953-12-29
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Expires: 1971-06-25
Abstract
No abstract record available.
Inventors
- 👤 Theodore E Weichselbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:37
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/96; G01N33/72; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/103332; Y10T436/105831
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF MAKING A HEMATIN STANDARDIZED REAGENT FOR USE IN COLORIMETRY AND IN CHECKING THE ACCURACY OF SPECTROPHOTOMETRIC CALIBRATION TABLES WHICH METHOD COMPRISES PLACING AN ACCURATELY MEASURED QUANTITY OF HEMATIN IN A MEASURED QUANTITY OF BORATE BUFFER SOLUTION TO PROVIDE A LIQUID REAGENT OF PREDETERMINED CONCENTRATION, PLACING AN ACCURATELY MEASURED QUANTITY OF THE SO-FORMED LIQUID REAGENT WITHIN AN ENCLOSABLE CONTAINER, FREEZING THE LIQUID REAGENT WITHIN THE ENCLOSABLE CONTAINER, SUBJECTING THE FROZEN MATERIAL TO A HIGH VACUUM SYSTEM FOR COMPLETE DESICCATION OF THE REAGENT TO PROVIDE A SOLID STARDARDIZED REAGENT, THEN CLOSING THE CONTAINER, OPENING THE CONTAINER AT THE TIME OF PREPARATION OF THE STANDARD, AND DEPOSITING THE ENTIRE CONTENTS OF THE CONTAINER INTO AN ACCURATELY MEASURED AND PREDETERMINED QUANTITY OF A BORATE BUFFER SOLUTION IN ORDER TO RECONSTITUTE THE LIQUID REAGENT IN ITS ORIGINAL STRENGTH.
Claim 2
Independent Claim
136 words
THE METHOD OF MAKING A HEMATIN STANDARDIZED REAGENT FOR USE IN COLORIMETRY AND IN CHECKING THE ACCURACY OF SPECTROPHOTOMETRIC CALIBRATION TABLES WHICH METHOD COMPRISES PLACING AN ACCURATELY MEASURED QUANTITY OF HEMATIN IN A MEASURED QUANTITY OF BORATE BUFFER SOLUTION TO PROVIDE A LIQUID REAGENT OF PREDETERMINED CONCENTRATION, PLACING AN ACCURATELY MEASURED QUANTITY OF THE SO-FORMED LIQUID REAGENT WITHIN AN ENCLOSABLE CONTAINER, FREEZING THE LIQUID REAGENT WITHIN THE ENCLOSABLE CONTAINER, SUBJECTING THE FROZEN MATERIAL TO A HIGH VACUUM SYSTEM FOR COMPLETE DESICCATION OF THE REAGENT TO PROVIDE A SOLID STARDARDIZED REAGENT, THEN CLOSING THE CONTAINER, OPENING THE CONTAINER AT THE TIME OF PREPARATION OF THE STANDARD, AND DEPOSITING THE ENTIRE CONTENTS OF THE CONTAINER INTO AN ACCURATELY MEASURED AND PREDETERMINED QUANTITY OF A BORATE BUFFER SOLUTION IN ORDER TO RECONSTITUTE THE LIQUID REAGENT IN ITS ORIGINAL STRENGTH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |