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US3553302A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of preparing polyolefin resin paper

Assignee: Lion Fat and Oil Co Ltd
•
Filing: 1969-12-15
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Granted: 1971-01-05
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Expires: 1989-12-15
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Abstract

Abstract A METHOD OF PREPARING AN OPAQUE AND WHITE POLYOLEFIN RESIN PAPER COMPRISING THE STEPS OF: KNEADING A MEMBER SELECTED FROM THE GROUP CONSISTING OF GYPSUM, CALCIUM SULFATE HEMIHYDRATE AND SOLUBLE ANHYDRITE AS THE FILLER WITH A POLYOLEFIN RESIN, SUBJECTING THUS KNEADED RESIN TO SHEET-OLDING, AND SUBSEQUENTLY HYDRATING SAID FILLER BY MEANS OF BRINGING THE RESULTANT SHET INTO CONTACT WITH WATER; AND A METHOD OF IMPARTING PAINTABLE AS WELL AS PRINTABLE PROPERTIES TO SID OPAQUE AND WHITE POLYOLEFIN RESIN PAPER COMPRISING THE STEPS OF: KNEADING CALCIUM SULFITE, IN ADDITION TO SAID FILLER, WITH A POLYOLEFIN RESIN SUBJECTING THUS KNEADED RESIN TO SHEET-MOLDING AND DIPPING IN WATER, AND SUBSEQUENTLY BRINGING THE RESULTANT SHEET INTO CONTACT WITH AN INORGANIC ACID.

Inventors

  • 👤 Rinnosuke Susuki
  • 👤 Hiroshi Hoshi
  • 👤 Jiro Saito
  • 👤 Hitoshi Iida
  • 👤 Humio Ito

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 00:40
CPC Classifications
B; B29; B29C; B29C59/00

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) 1974-01-04 1974-07-06 1975-01-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-01-04 1978-07-06 1979-01-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-01-04 1982-07-06 1983-01-05 $7700.00 Window Closed / Lapsed

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