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US3239943A Expired / Lapsed US ⏱️ 0.0 years remaining

Cooling rubber crumb for dryer feed

Assignee: Phillips Petroleum Co
•
Filing: 1961-12-21
•
Granted: 1966-03-15
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Expires: 1981-12-21
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Abstract

No abstract record available.

Inventors

  • 👤 Charles L Davis

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 06:56
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/06; B29K; B29K2021/00

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 119 words
IN A PROCESS WHICH COMPRISES INTRODUCING A RUBBERY DIENE POLYMER CRUMB INTO A DEMOISTURIZING ZONE COMPRISING A CONTINUOUS SCREW PRESS AND DOWNSTREAM THEREFROM AN EXTRUSION DRYER; THE IMPROVEMENT WHICH COMPRISES INTRODUCING A HOT WATER SLURRY OF SAID RUBBERY DIENE POLYMER CRUMB INTO A MIXING ZONE UPSTREAM OF SAID DEMOISTURIZING ZONE, INTRODUCING COOL WATER INTO SAID MIXING ZONE AND THEREIN CONTACTING SAID SLURRY WITH SAID COOL WATER IN SAID MIXING ZONE SO AS TO SUFFICIENTLY FURTHER DILUTE AND COOL SAID SLURRY TO A TEMPERATURE IN THE RANGE BETWEEN 65 AND 105*F. IN A PREDEMOISTURIZING ZONE COOLING STEP, AND THEREAFTER REMOVING THE FREE WATER FROM THE RESULTING COOLED CRUMB PRIOR TO THE INTRODUCTION OF SAID COOLED CRUMB TO SAID DEMOISTURIZING ZONE.
Claim 2
Dependent Claim 119 words
IN A PROCESS WHICH COMPRISES INTRODUCING A RUBBERY DIENE POLYMER CRUMB INTO A DEMOISTURIZING ZONE COMPRISING A CONTINUOUS SCREW PRESS AND DOWNSTREAM THEREFROM AN EXTRUSION DRYER; THE IMPROVEMENT WHICH COMPRISES INTRODUCING A HOT WATER SLURRY OF SAID RUBBERY DIENE POLYMER CRUMB INTO A MIXING ZONE UPSTREAM OF SAID DEMOISTURIZING ZONE, INTRODUCING COOL WATER INTO SAID MIXING ZONE AND THEREIN CONTACTING SAID SLURRY WITH SAID COOL WATER IN SAID MIXING ZONE SO AS TO SUFFICIENTLY FURTHER DILUTE AND COOL SAID SLURRY TO A TEMPERATURE IN THE RANGE BETWEEN 65 AND 105*F. IN A PREDEMOISTURIZING ZONE COOLING STEP, AND THEREAFTER REMOVING THE FREE WATER FROM THE RESULTING COOLED CRUMB PRIOR TO THE INTRODUCTION OF SAID COOLED CRUMB TO SAID DEMOISTURIZING ZONE.

References Cited (Backward Citations)

US2957855A Cited
US2371722A Cited
US2665568A Cited
US2930784A Cited
US2953556A Cited
US3067462A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-03-14 1969-09-13 1970-03-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-03-14 1973-09-13 1974-03-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-03-14 1977-09-13 1978-03-15 $7700.00 Window Closed / Lapsed

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