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US3714035A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for thin layer chromatography

Assignee: ANALYTICAL SYSTEMS Inc A CORP OF
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Filing: 1971-05-19
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Granted: 1973-01-30
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Expires: 1991-05-19
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Abstract

Abstract METHOD AND APPARATUS ARE PROVIDED FOR CARRYING OUT CHROMATOGRAPHS ON A THIN LAYER OF ADSORBENT, WHERE THE THIN LAYER OF ADSOREBET HAS A PLURALITY OF HOLLOWS ADJACENT TO ONE END. INSERTED IN AT LEAST ONE OF THE HOLLOWS IN AN INSERT WHICH IS IMPREGNATED WITH AT LEAST ONE COMPOUND OF KNOWN CHEMICAL COMPOSITION AND INSERTED IN AT LEAST ONE OF THE OTHER HOLLOWS IS AN INSERT IMPREGNATED WITH A SOLUTION HAVING ONE OR MORE UNKNOWN COMPOUNDS. THE DEVELOPMENT OF THE CHROMATOGRAPH IS THEN CARRIED OUT IN A NORMAL MANNER. BY COMPARING THE DISTANCE THE UNKNOWN COMPOUND HAS TRAVELED WITH THE DISTANCE THE KNOWN COMPOUND OR COMPOUNDS HAVE TRAVELED AND THKEIR RESPONSE TO VARIOUS DEVELOPING MATERIALS, SUCH AS DYES, OXIDANTS, ETC., THE UNKNOWN COMPOUND CAN BE DETERMINED, AS WELL AS A QUALITATIVE ESTIMATE OF THE AMOUNT.

Inventors

  • 👤 D Jones

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 13:05
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/91

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) 1976-01-30 1976-07-31 1977-01-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-01-30 1980-07-31 1981-01-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-01-30 1984-07-31 1985-01-30 $7700.00 Window Closed / Lapsed

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