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US3020268A Expired / Lapsed US ⏱️ 0.0 years remaining

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Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-10-21
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Granted: 1962-02-06
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Expires: 1977-10-21
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Abstract

No abstract record available.

Inventors

  • 👤 Henry G Schutze
  • 👤 Leibson Irving
  • 👤 Delos E Bown

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 06:19
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08F; C08F10/00; C08J2323/00; C08J2323/02

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 304 words
IN A METHOD WHEREIN A C2 TO C6 ALPHA OLEFIN IS POLYMERIZED IN THE PRESENCE OF A NON-OLEFINIC, NON-POLAR ORGANIC DILUENT CONTAINING A CATALYST AMOUNT OF A REDUCED COMPOUND OF A METAL OF THE GROUP CONSISTING OF GROUPS IV-B, V-B, VI-B, AND VIII OF THE PERIODIC SYSTEM OF ELEMENTS UNDER CONDITIONS TO FORM A POLYMER OF SAID OLEFIN MELTING ABOVE ABOUT 100* C. WHEREBY THERE IS FORMED A FIRST SLURRY OF POLYMER PARTICLES IN SAID DILUENT, SAID PARTICLES HAVING SURFACE AREAS IN EXCESS OF ABOUT 10 M. 2/G., PARTICLE DIAMETERS OF LESS THAN ABOUT 1,000 A. AND A PARTICLE SPECIFIC GRAVITY ABOUT THE SAME AS THE SPECIFIC GRAVITY OF SAID DILUENT, THE IMPROVEMENT WHICH COMPRISES QAUENCHING SAID FIRST SLURRY WITH A C1-C4 ALCOHOL TO DEACTIVATE SAID CATALYST, THEREAFTER, PRIOR TO EXPOSURE OF SAID PARTICLES TO A POLAR ATMOSPHERE, SEPARATING SAID PARTICLES FROM SAID FIRST SLURRY, SLURRYING SAID SEPARATED PARTICLES IN A LIQUID MEDIUM COMPRISING AT LEAST ON C1 TO C4 ALCOHOL AND NON-POLAR, NON-OLEFINIC ORGANIC DILUENT TO PROVIDE A SECOND SLURRY, HEATING SAID SECOND SLURRY TO A TEMPERATURE OF A BOUT 20 TO ABOUT 50* C. BELOW THE MELTING POINT OF SAID POLYMER AT A PRESSURE WITHIN THE RANGE OF ABOUT 0 TO 100 P.S.I.G., SUFFICIENT TO RENDER SAID POLYMER SPARINGLY SOLUBLE IN SAID DILUENT, SAID SECOND SLURRY BEING MAINTAINED UNDER SAID TEMPERATURE AND PRESSURE CONDITIONS FOR A PERIOD OF TIME SUFFICIENT TO SELECTIVELY SOFTEN THE SURFACE OF SAID PARTICLES AND TO AGGLOMERATE SAID PARTICLES TO AN EXTENT SUFFICIENT TO INCREASE THE SPECIFIC GRAVITY OF SAID PARTICLES BY ABOUT 120 TO 200 PERCENT WHEREBY AGGLOMERATED PARTICLES ARE PROVIDED HAVING SURFACE AREAS OF LESS THAN ABOUT 1 M.2/G. AND PARTICLE DIAMETERS OF NOT LESS THAN 1 MICRON, COOLING SAID SECOND SLURRY OF AGGLOMERATED PARTICLES AND THEN SEPARATING SAID THUS AGGLOMERATED PARTICLES FROM SAID LIQUID MEDIUM.
Claim 2
Dependent Claim 304 words
IN A METHOD WHEREIN A C2 TO C6 ALPHA OLEFIN IS POLYMERIZED IN THE PRESENCE OF A NON-OLEFINIC, NON-POLAR ORGANIC DILUENT CONTAINING A CATALYST AMOUNT OF A REDUCED COMPOUND OF A METAL OF THE GROUP CONSISTING OF GROUPS IV-B, V-B, VI-B, AND VIII OF THE PERIODIC SYSTEM OF ELEMENTS UNDER CONDITIONS TO FORM A POLYMER OF SAID OLEFIN MELTING ABOVE ABOUT 100* C. WHEREBY THERE IS FORMED A FIRST SLURRY OF POLYMER PARTICLES IN SAID DILUENT, SAID PARTICLES HAVING SURFACE AREAS IN EXCESS OF ABOUT 10 M. 2/G., PARTICLE DIAMETERS OF LESS THAN ABOUT 1,000 A. AND A PARTICLE SPECIFIC GRAVITY ABOUT THE SAME AS THE SPECIFIC GRAVITY OF SAID DILUENT, THE IMPROVEMENT WHICH COMPRISES QAUENCHING SAID FIRST SLURRY WITH A C1-C4 ALCOHOL TO DEACTIVATE SAID CATALYST, THEREAFTER, PRIOR TO EXPOSURE OF SAID PARTICLES TO A POLAR ATMOSPHERE, SEPARATING SAID PARTICLES FROM SAID FIRST SLURRY, SLURRYING SAID SEPARATED PARTICLES IN A LIQUID MEDIUM COMPRISING AT LEAST ON C1 TO C4 ALCOHOL AND NON-POLAR, NON-OLEFINIC ORGANIC DILUENT TO PROVIDE A SECOND SLURRY, HEATING SAID SECOND SLURRY TO A TEMPERATURE OF A BOUT 20 TO ABOUT 50* C. BELOW THE MELTING POINT OF SAID POLYMER AT A PRESSURE WITHIN THE RANGE OF ABOUT 0 TO 100 P.S.I.G., SUFFICIENT TO RENDER SAID POLYMER SPARINGLY SOLUBLE IN SAID DILUENT, SAID SECOND SLURRY BEING MAINTAINED UNDER SAID TEMPERATURE AND PRESSURE CONDITIONS FOR A PERIOD OF TIME SUFFICIENT TO SELECTIVELY SOFTEN THE SURFACE OF SAID PARTICLES AND TO AGGLOMERATE SAID PARTICLES TO AN EXTENT SUFFICIENT TO INCREASE THE SPECIFIC GRAVITY OF SAID PARTICLES BY ABOUT 120 TO 200 PERCENT WHEREBY AGGLOMERATED PARTICLES ARE PROVIDED HAVING SURFACE AREAS OF LESS THAN ABOUT 1 M.2/G. AND PARTICLE DIAMETERS OF NOT LESS THAN 1 MICRON, COOLING SAID SECOND SLURRY OF AGGLOMERATED PARTICLES AND THEN SEPARATING SAID THUS AGGLOMERATED PARTICLES FROM SAID LIQUID MEDIUM.

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) 1965-02-05 1965-08-07 1966-02-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1969-02-05 1969-08-07 1970-02-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1973-02-05 1973-08-07 1974-02-06 $7700.00 Window Closed / Lapsed

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