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US3817706A Expired / Lapsed US ⏱️ 0.0 years remaining

Fluorescence quantitative thin layer chromatographic method

Assignee: GD Searle LLC
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Filing: 1972-10-16
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Granted: 1974-06-18
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Expires: 1992-10-16
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Abstract

Abstract METHOD OF INCLUDING FLUORESCENT CHROMOPHORES INTO A VARIETY OF ORGANIC SUBSTRATE MOLECULES. ONE INTRODUCED INTO THE MOLECULE TO BE ANALYZED, THE FLUORESCENT CHROMOPHORE PERMITS RAPID AND ACCURATE QUANTITATIVE ANALYSIS OF THE SUBSTRATE PRECURSOR BY STANDARD FLUORESCENT SPECTROPHOTOMETRIC TECHNIQUES. THE PROCESS OF INTRODUCING THE CHROMOPHORE INVOLVES IMPREGNATING THE ABSORBENT MATERIAL WITH AMMONIUM SULFATE, SIMULTANEOUSLY DEVELOPING THE UNKNOWN WITH KNOW STANDARDS, EXPOSING THE DEVELOPED PLATE TO TERT-BUTYL HYDOCHLORITE, AND HEATING THE CHROMATOGRAM. AMINO ACIDS, FATTY ACIDS, TRIGLYCERIDES, SUGARS STEROIDS AND PROSTAGLANDINS ARE ANALYZED BY THIS TECHNIQUE IN MICROGRAM QUANTITIES.

Inventors

  • 👤 B Smith

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 19:34
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/94; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/141111; Y10T436/142222; Y10T436/143333; Y10T436/144444; Y10T436/20; Y10T436/200833; Y10T436/201666

Claims Analysis

Total Claims: 0
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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) 1977-06-17 1977-12-17 1978-06-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-17 1981-12-17 1982-06-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-17 1985-12-17 1986-06-18 $7700.00 Window Closed / Lapsed

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