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US3663463A Expired / Lapsed US ⏱️ 0.0 years remaining

Noncombustible and fireproofing polymer compositions and process

Assignee: HENRY K WREN
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Filing: 1970-07-16
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Granted: 1972-05-16
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Expires: 1990-07-16
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Abstract

Abstract NONCOMBUSTIBLE AND FIREPROOFING POLYMER COMPOSITIONS ARE PREPARED BY REACTING VIA A CONDENSATION MECHANISM, A POLYCOL, AN ORGANIC ANHYDRIDE, OR AN ORGANIC ACID, AND BORIC ACID TO FORM FIRST AN ESTERIFIED MATERIAL AND THEN FURTHER CONDENSING THIS ESTERIFIED MATERIAL WITH BOTH A NITROGENOUS SPUMIFIC COMPOUND AND A CARBOHYDRATE CLASS COMPOUND TO FORM THE NONCOMBUSTIBLE AND FIREPROOFING POLYMER COMPOSITIONS. THE POLYMER COMPOSITIONS MAY THEN BE FORMED INTO NONCOMBUSTIBLE FILMS, SHEETS, LAMINATES OR FIBERS, CAST, EXTRUDED OR OTHERWISE FORMED INTO ARTICLES OR MAY BE INCORPORATED INTO PAINTS, LACQUERS, VARNISHES, PLASTICS, RUBBERS, TO YIELD THESE MATERIALS FIREPROOF, AND ADDITIONALLY MAY BE COATED ALONE OR AS A FURTHER COMPOSITION ON FIBERS, FABRICS, WOOD, PAPER, CARDBOARD, PLASTICS, LEATHER, WIRE AND SO ON.

Inventors

  • 👤 Henry K Wren

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 19:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/67; C08G18/68; C08G63/00; C08G63/68; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/3179; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2648

Claims Analysis

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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) 1975-05-16 1975-11-15 1976-05-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-16 1979-11-15 1980-05-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-16 1983-11-15 1984-05-16 $7700.00 Window Closed / Lapsed

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