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US3785989A Expired / Lapsed US ⏱️ 0.0 years remaining

Novel daylight fluorescent pigments and process for preparing them

Assignee: Hoechst AG
•
Filing: 1972-01-31
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Granted: 1974-01-15
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Expires: 1992-01-31
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Abstract

Abstract NEW DAYLIGHT FLUORESCENT PIGMENTS WHICH CONTAIN AN ORGANIC FLUORESCENT DYESTUFF AND AS RESIN A CONDENSATION RESIN, CONSISTING OF COPOLYMERIZATES OF UNSATURATED CARBOXYLIC ACID ANHYDRIDES AND OTHER VINYL COMPOUNDS WHICH ARE CROSS-LINKED WITH BI- OR POLYFUNCTIONAL ALCOHOLS AND A PROCESS FOR THEIR PREPARATION WHICH COMPRISES INCORPORATING THE ORGANIC FLUORESCENT DYESTUFF INTO THE CONDENSATION RESIN. THESE DAYLIGHT FLUORESCENT PIGMENTS MAY BE EMPLOYED FOR PREPARING FLUORESCENT PAINTS, FOR EXAMPLE AIR-DRYING LACQUERS ON THE BASIS OF ALKYL RESIN OR PHYSICALLY DRYING LACQUERS ON THE BASIS OF ACRYLIC RESINS, AS WELL AS FOR PREPARING FLUORESCENT PRINTING INKS SUCH AS INKS FOR SCREEN PRINTING, INTAGLIO PRINTING, BOOK-PRINTING AND OFFSETLITHO PRINTING. DUE TO THEIR RESISTANCE TO HEAT, THEY ARE PARTICULARLY SUITABLE FOR FLUORESCENT DYEING OF PLASTIC AND ENAMELS.

Inventors

  • 👤 S Noetzel
  • 👤 E Fischer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 02:28
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C08; C08K; C08K5/00; C08K5/0008; C08K5/0041; C09D; C09D5/00; C09D5/22; C09K11/02

Claims Analysis

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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) 1977-01-14 1977-07-16 1978-01-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-01-14 1981-07-16 1982-01-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-01-14 1985-07-16 1986-01-15 $7700.00 Window Closed / Lapsed

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