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US3844983A Expired / Lapsed US ⏱️ 0.0 years remaining

Arrangement related to inflatable life rafts room temperature curing poly(fluoroalkoxyphosphazene)copolymers and terpolymers

Assignee: Horizons Inc
•
Filing: 1972-11-02
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Granted: 1974-10-29
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Expires: 1992-11-02
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Abstract

Abstract 1. POLYPHOSPHAZENES THE SKELETAL CHAINS OF WHICH COMPRISE RANDOMLY REPEATING UNITS REPRESENTED BY THE GENERAL FORMULAS -(P(-O-R)2=N)- AND -(P(-O-R)(-O-W)=N)- WHEREIN EACH R IS A MONOVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, FLUOROALKYL, ARYL, SUBSTITUTED ARYL AND ARYLALKYL AND NOT EVERY R IN THE POLYPHOSPHAZENE IS REQUIRED TO BE IDENTICAL TO EVERY OTHER R; AND EACH W IS A MONOVALENT GROUP CONTAINING -NH OR -NH2 FUNCTIONALITY, AND WHEREIN W IS SELECTED FROM THE GROUP WHICH CONSISTS OF -R''-NH-R", -R"''-NH2 AND -CH2-CH2-X<(-CH2-CH2-NH-CH2-CH2-) WHEREIN R'' IS (-CH2-)A OR -C6H4$CH$A WHEREIN A IS AN INTERGER FROM 1 TO 4, AND WHEREIN X REPRESENTS CH OR N,R" REPRESENTS LOWER ALKYL WITH UP TO 4 CARBON ATOMS; R''" REPRESENTS ALKYL, ARYL, ARALKYL, ALKYLARLY, AND THE ARYL GROUP IS CARBOCYCLIC OR HETEROCYCLIC; AND THE RATIO OF R/W IS FROM ABOUT 99.5/0.5 TO 65/35.

Inventors

  • 👤 K Reynard
  • 👤 S Rose

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 11:48
CPC Classifications
C; C08; C08L; C08L85/00; C08L85/02; C08G; C08G79/00; C08G79/02; C08G79/025

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 15 words
POLYPHOSPHAZENES THE SKELETAL CHAINS OF WHICH COMPRISE RANDOMLY REPEATING UNITS REPRESENTED BY THE GENERAL FORMULAS
Claim 2
Dependent Claim 15 words
POLYPHOSPHAZENES THE SKELETAL CHAINS OF WHICH COMPRISE RANDOMLY REPEATING UNITS REPRESENTED BY THE GENERAL FORMULAS

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-10-28 1978-04-29 1978-10-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-28 1982-04-29 1982-10-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-28 1986-04-29 1986-10-29 $7700.00 Window Closed / Lapsed

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