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US3781350A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for preparation of omega-hydroxy saturated aliphatic monocarboxylic acids

Assignee: Teijin Ltd
•
Filing: 1972-07-06
•
Granted: 1973-12-25
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Expires: 1992-07-06
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Abstract

Abstract SATURATED ALIPHATIC DICARBOXLIC ACIDS OF 4 TO 12 CARBON ATOMS CAN BE CONVERTED TO THE CORRESPONDING WHYDROXY SATURATED ALIPHATIC MONOCARBOXYLIC ACIDS IN HIGH YIELDS AND WITH HIGH SELECTIVITY WHEN THEY ARE CONTACTED WITH HYDROGEN TOGETHER WITH SATURATED ALIPHATIC GLYCOLS OF THE SAME NUMBER OF CARBON ATOMS IN THE PRESENCE OF A CATALYST COMPRISING (1) METALLIC COBALT DERIVED BY REDUCING AT LEAST ONE COBALT COMPOUND (FIRST COMPONENT) SELECTED FROM THE GROUP CONSISTING OF COBALT OXIDES, COBALT CARBONATES AND COBALT HYDROXIDES AND (2) A METAL AND/ OR A METAL COMPOUND DERIVED BY REDUCING AT LEAST ONE COMPOUND (SECOND COMPONENT) SELECTED FROM THE GROUP CONSISTING OF PHOSPHATES, BORATES, MOLYBDATES AND TUNGSTATES OF IRON, ZINC OR COBALT, OXIDES AND HYDROXIDES OF IRON, RHENIUM, ZINC, PHOSPHORUS, BORON, MOLYBDENUM OR TUNGESTEN, AND CARBONATES OF IRON OR ZINC.

Inventors

  • 👤 Y Fujita
  • 👤 T Toda
  • 👤 T Shimada

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 16:51
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/01; C07C51/00; C07C51/347

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) 1976-12-24 1977-06-25 1977-12-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-12-24 1981-06-25 1981-12-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-12-24 1985-06-25 1985-12-25 $7700.00 Window Closed / Lapsed

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