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US3655816A Expired / Lapsed US ⏱️ 0.0 years remaining

Phosphorus acid-diesters and epoxy resin systems containing the same

Assignee: Deutsche Advance Produktion GmbH
•
Filing: 1969-12-24
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Granted: 1972-04-11
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Expires: 1989-12-24
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Abstract

Abstract AN EPOXY RESIN SYSTEM OF CONVENTIONAL COMPOSITION WITH HARDENING AGENTS AND POSSIBLY FURTHER COUSTOMARY ADDITIVES, CONTAINING ALSO AS HARDENING ACCELERATOR FROM 0.1 TO 150, AND PREFERABLY FORM 5 TO 20, PARTS BY WEIGHT OF A PHOSPHOROUS ACID-DIESTER OF THE GENERAL FORMULA: R-O-PH(-O-R'')=O IN WHICH R AND R'' CAN BE THE SAME OR DIFFERENT AND SIGNIFY STRIGHT CHAIN ALKYL CONTAINING FORM 1 TO 14 CARBON ATOMS, BRANCHED ALKYL CONTAINING FORM 3 TO 14 CARBON ATOMS, STRAIGHT CHAIN ALKOXYALKYL HAVING 2 TO 14 CARBON ATOMS, BRANCHED ALKOXYALKYL HAVING 3 TO 14 CARBON ATOMS, ALKENYL AND SUBSTITUTED ALKENYL, ARYL, AND ARALKYL AND ALKARYL WHEREIN THE ALKYL PORTIONS CONTAIN FORM 1 TO 9 CARBON ATOMS, AND AT LEAST ONE OF THE SUBSTITUENTS R AND R'' CONTAINS AT LEAST ON CHLORINE AND/OR BROMINE ATOM, PER 100 PARTS BY WEIGHT OF EPOXY RESIN, AND A PHOSPHOROUS ACID-DIESTER OF THE SAME GENERAL FORMULA WHEREIN R AND R'' ARE DIFFERENT.

Inventors

  • 👤 Hans Joachim Lorenz
  • 👤 Hansjurgen Sander

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 06:10
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4071

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) 1975-04-11 1975-10-11 1976-04-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-04-11 1979-10-11 1980-04-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-04-11 1983-10-11 1984-04-11 $7700.00 Window Closed / Lapsed

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