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US2522022A Expired / Lapsed US ⏱️ 0.0 years remaining

Sugar purification process

Assignee: Wyeth Holdings LLC
•
Filing: 1945-11-17
•
Granted: 1950-09-12
•
Expires: 1965-11-17
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Abstract

No abstract record available.

Inventors

  • 👤 Walter W Durant
  • 👤 William A Blann

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 17:28
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 169 words
A PROCESS WHICH COMPRISES PASSING A RAW SUGAR JUICE TO ANY CHEMICAL TREATMENT THROUGH A SYSTEM INCLUDING A SERIES OF IRON EXCHANGERS, COMPRISING A PLURALITY OF PAIRS OF ION EXCHANGERS, THE FIRST ONE OF EACH PAIR BEING A HYDROGEN ZEOLITE AND THE OTHER OF EACH PAIR BEING A RESINOUS ANION EXCHANGER, CONTINUING TO PASS SAID JUICE THROUGH THE SYSTEM WHILE THE PH OF THE INFLUENT TO THE FINAL ACTION EXCHANGER IS HIGHER THAN 2.9, AND THEN, WHEN THE PH OF THE INFLUENT TO SAID FINAL ANION EXCHANGER DROPS TO ABOUT 3, MODIFYING THE SYSTEM BY ADDING A NEW PAIR OF ION EXCHANGERS AT THE END OF THE SYSTEM, COMPPRISING FIRST A HYDROGEN ZEOLITE AND THEN A RESINOUS ANION EXCHANGER, THEN PASSING THE EFFLUENT FROM THE ANION EXCHANGER WHICH WAS FORMERLY THE FINAL ANION EXCHANGER INTO SAID NEW PAIR OF ION EXCHANGERS AND CONTINUING TO PASS THE RAW SUGAR JUICE THROUGH THE SYSTEM SO MODIFIED WHILE THE INFLUENT TO THE ANION EXCHANGER OF SAID NEW PAIR IS HIGHER THAN 2.9.

References Cited (Backward Citations)

US2104501A Cited
US2151883A Cited
US2155318A Cited
US2264654A Cited
US2388222A Cited
US2413844A Cited
US2388194A Cited
US2366650A Cited
US2402960A Cited
US2372233A Cited
US2388195A Cited
US2403177A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1953-09-11 1954-03-13 1954-09-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1957-09-11 1958-03-13 1958-09-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1961-09-11 1962-03-13 1962-09-12 $7700.00 Window Closed / Lapsed

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