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US3734786A Expired / Lapsed US ⏱️ 0.0 years remaining

Solid propellants fabricated from a mixed polymer system

Assignee: RTX Corp
•
Filing: 1971-02-16
•
Granted: 1973-05-22
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Expires: 1991-02-16
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Abstract

Abstract FUNCTIONALLY TERMINATED POLYISOBUTYLENE AND FUNCTIONALLY TERMINATED POLYBUTADIENE ARE NOT COMPLETELY SOLUBLE IN EACH OTHER AT ROOM TEMPERATURE AND LOWER. NEVERTHELESS, IT HAS BEEN DISCOVERED THAT THE INSOLUBLE MIXTURES OF THESE MATERIALS CAN BE CROSSLINKED TO FORM A HOMOGENEOUS BINDER NETWORK WHICH IS PARTICULARLY USEFUL IN THE MANUFACTURE OF COMPOSITE SOLID PROPELLANTS. FUNCTIONALLY TERMINATED POLYISOBUTYLENE AND FUNCTIONALLY TERMINATED POLYBUTADIENE ARE NOT COMPLETELY SOLUBLE IN EACH OTHER AT ROOM TEMPRATURE AND LOWER. NEVERTHELESS, IT HAS BEEN DISCOVERED THAT THE INSOLUBLE MIXTURES OF THESE MATERIALS CAN BE CROSSLINKED TO FORM A HOMOGENEOUS BINDER NETWORK WHICH IS PARTICULARLY USEFUL IN THE MANUFACTURE OF COMPOSITE SOLID PROPELLANTS.

Inventors

  • 👤 E Walden
  • 👤 J Allan

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 17:40
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C08; C08L; C08L19/00; C08L19/006; C08L23/00; C08L23/26

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) 1976-05-21 1976-11-20 1977-05-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-05-21 1980-11-20 1981-05-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-05-21 1984-11-20 1985-05-22 $7700.00 Window Closed / Lapsed

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