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US3578485A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of producing a coated paper

Assignee: Kuraray Co Ltd
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Filing: 1968-07-26
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Granted: 1971-05-11
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Expires: 1988-07-26
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Abstract

Abstract A PROCESS FOR PRODUCING A COATED, PAPER, HAVING IMPROVED WATER-RESISTANCE AND SUPERIOR, PRINTABILITY CHARACTERIZED BY TREATING THE COATED SURFACE OF A PAPER COATED WITH A COLOR COMPOSITION CONTAINING AS THE PRINCIPAL CONSTITUENT A PIGMENT AND A POLYVINYL ALCOHOL WITH A SOLUTION CONTAINING A BORIC COMPOUND HAVING AN ELECTRON ACCEPTING STRUCTURE SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND BORIC SALTS, A WATER-SOLUBLE AMINO COMPOUND HAVING ONE OR MORE OF PRIMARY, SECONDARY, TERTIARY OR QUATERNARY AMINO GROUPS IN ITS MOLECULE, AN ELECTRON DONATING STRUCTURE AND A BOILING POINT IN EXCEDD OF ABOUT 100*C., AND A SURFACE ACTIVE AGENT WHICH REDUCES THE SURFACE TENSION OF THE TREATING SOLUTION.

Inventors

  • 👤 Saburo Imoto
  • 👤 Kyoichiro Ikari
  • 👤 Tatsuaki Hattori

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 18:06
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/02; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/60

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) 1974-05-10 1974-11-09 1975-05-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-05-10 1978-11-09 1979-05-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-05-10 1982-11-09 1983-05-11 $7700.00 Window Closed / Lapsed

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