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US3842153A Expired / Lapsed US ⏱️ 0.0 years remaining

Polypropylene

Assignee: Midland Silicones Ltd
•
Filing: 1972-04-26
•
Granted: 1974-10-15
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Expires: 1992-04-26
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Abstract

Abstract 1. A PROCESS FOR THE PRODUCTION OF A SHAPED ARTICLE BY THE MELT EXTRUSION OF THERMALLY DEGRADED ISOTACTIC POLYPROPYLENE WHEREIN THE THERMAL DEGRADATION OF THE POLYPROPYLENE IS CARRIED OUT IN THE PRESENCE OF FROM 0.01 TO 5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF POLYPROPYLENE OF (A) AN ORGANOSILICON COMPOUND WHICH IS AN ORGANOSILANE OR ORGANOSILOXANE HAVING THEREIN AT LEAST ONE SILICONBONDED GROUP OF THE GENERAL FORMULA-CH2NR2, WHEREIN EACH R REPRESENTS A HYDROGEN ATOM OR A MONOVALENT HYDROCARBON RADICAL, 8B) AN ORGANOSILICON COMPOUND OF THE GENERAL FORMULA 1-(HO-),2-R",4-R"'',6-R''-CYCLOHEXANE WHEREIN R'', R" AND R"'' EACH REPRESENT A HYDROGEN ATOM, AN ALKYL RADICAL HAVING UP TO 18 CARBON ATOMS, AN ARALKYL RADICAL HAVING UP TO 18 CARBON ATOMS OR A Q3SICH2GROUP, WHEREIN Q REPRESENTS AN ALKYL, ALKENYL OR ARYL RADICAL HAVING UP TO 18 CARBON ATOMS AT LEAST ONE OF R'', R" AND R"'' BEING THE Q3SICH2- GROUP, OR (C) MIXTURES OF (A) AND (B).

Inventors

  • 👤 W Owen
  • 👤 B Cooper

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 22:59
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; C; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/544; D01F6/00; D01F6/02; D01F6/04; D01F6/06; Y; Y10; Y10S; Y10S260/00; Y10S260/43

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 87 words
A PROCESS FOR THE PRODUCTION OF A SHAPED ARTICLE BY THE MELT EXTRUSION OF THERMALLY DEGRADED ISOTACTIC POLYPROPYLENE WHEREIN THE THERMAL DEGRADATION OF THE POLYPROPYLENE IS CARRIED OUT IN THE PRESENCE OF FROM 0.01 TO 5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF POLYPROPYLENE OF (A) AN ORGANOSILICON COMPOUND WHICH IS AN ORGANOSILANE OR ORGANOSILOXANE HAVING THEREIN AT LEAST ONE SILICONBONDED GROUP OF THE GENERAL FORMULA-CH2NR2, WHEREIN EACH R REPRESENTS A HYDROGEN ATOM OR A MONOVALENT HYDROCARBON RADICAL, 8B) AN ORGANOSILICON COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim 87 words
A PROCESS FOR THE PRODUCTION OF A SHAPED ARTICLE BY THE MELT EXTRUSION OF THERMALLY DEGRADED ISOTACTIC POLYPROPYLENE WHEREIN THE THERMAL DEGRADATION OF THE POLYPROPYLENE IS CARRIED OUT IN THE PRESENCE OF FROM 0.01 TO 5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF POLYPROPYLENE OF (A) AN ORGANOSILICON COMPOUND WHICH IS AN ORGANOSILANE OR ORGANOSILOXANE HAVING THEREIN AT LEAST ONE SILICONBONDED GROUP OF THE GENERAL FORMULA-CH2NR2, WHEREIN EACH R REPRESENTS A HYDROGEN ATOM OR A MONOVALENT HYDROCARBON RADICAL, 8B) AN ORGANOSILICON COMPOUND OF THE GENERAL FORMULA

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) 1977-10-14 1978-04-15 1978-10-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-14 1982-04-15 1982-10-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-14 1986-04-15 1986-10-15 $7700.00 Window Closed / Lapsed

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