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US3746760A Expired / Lapsed US ⏱️ 0.0 years remaining

N-monohalomonosubstituted ureas

Assignee: Pennwalt Corp
•
Filing: 1967-11-21
•
Granted: 1973-07-17
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Expires: 1987-11-21
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Abstract

Abstract A PROCESS FOR MAKING N-MONOCHLORO OR BROMO MONOSUBSTITUTED UREA WHERE A UREA RNH-CO-NH2 IS SUSPENDED IN LIQUID WATER AT 0*C.-60*C. AND REACTED WITH FREE CHLORINE OR FREE BROMINE, AT LEAST 2G. ATOM PER MOLE OF UREA, PREFERABLY IN THE PRESENCE OF AN ACID ACCEPTOR SUCH AS ZINC OXIDE; R MAY BE ALKYL HAVING 3 CARBON ATOMS, CYCLOALKYL, ARALKYL, ALKOXYCARBONYL, ARYLOXYCARBONYL OR ACYL. NEW COMPOUNDS OF THE FORMULA RD-NX-CO-NX''H WHERE X AND X'' ARE DIFFERENT AND ARE (1) CHLORO OR BROMO AND (2) HYDROGEN AND RD IS ALKYL OR CYCLOALKYL, 3-15 CARBON ATOMS, OR R1C(O)-, WHERE R1 IS ALIPHATIC, CYCLOALIPHATIC, ARYL, ALKOXY OR ARYLOXY, EACH OF NOT MORE THAN 10 CARBON ATOMS AND WHEN X IS H, X'' IS CL OR BR AND RD IS ALKYL OR CYCLOALKYL AND WHEN X IS CL OR BR, X'' IS H AND RD IS R1C(O)-.

Inventors

  • 👤 C Sheppard
  • 👤 L Korczykowski

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 14:16
CPC Classifications
C; C07; C07C; C07C243/00; C07C273/00; C07C273/18; C07C273/1854; C07C275/00; C07C275/46; C07C275/58; C07C275/60; C07C275/66; C07C275/70; C07C2601/00; C07C2601/12; C07C2601/14

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) 1976-07-16 1977-01-15 1977-07-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-07-16 1981-01-15 1981-07-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-07-16 1985-01-15 1985-07-17 $7700.00 Window Closed / Lapsed

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