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US3679446A Expired / Lapsed US ⏱️ 0.0 years remaining

Molding materials of calcium silicate hydrate and shaped products thereof

Assignee: Ohara Inc
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Filing: 1969-06-02
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Granted: 1972-07-25
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Expires: 1989-06-02
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Abstract

Abstract A MOLDING MATERIAL OF CRYSTALLIZED CALCIUM SILICATE HYDRATE WHICH COMPRISES WATER AND CALCIUM SILICATE CRYSTALS DISPERSED IN THE WATER IN THE WEIGHT RATIO OF SOLID TO WATER OF BETWEEN 1:10 AND 1:25; AT LEAST 40 WEIGHT PERCENT OF SAID CALCIUM SILICATE CRYSTALS HAVING FORMED NUMEROUS SMALL AGGLOMERATES OF A DIAMETER OF 10 TO 150 MICRONS BY BEING THREE-DIMENSIONALLY INTERLOCKED WITH ONE ANOTHER; AND AGGLOMERATES BEING DISPERSED IN THE WATER IN SUBSTANTIALLY GLOBULAR FORM; A SHAPED PRODUCT OF CRYSTALLIZED CALCIUM SILICATE HYDRATE WHICH COMPRISES AGGLOMERATES OF CALCIUM SILICATE CRYSTALS BEING COMPRESSED TO AT LEAST ONE DIRECTION AND INTERLOCKED WITH ONE ANOTHER AND VOIDS INTERSPERSED THEREBETWEEN, SAID AGGLOMERATES HAVING HAD A DIAMETER OF 10 TO 150U.

Inventors

  • 👤 Kazuhiko Kubo

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 12:05
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18

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) 1975-07-25 1976-01-24 1976-07-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-07-25 1980-01-24 1980-07-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-07-25 1984-01-24 1984-07-25 $7700.00 Window Closed / Lapsed

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