Patent US2785998A successfully refreshed from Google Patents.
US2785998A
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Process of decolorizing sugar solutions with a porous quaternary ammonium anion exchanger
Assignee: Rohm and Haas Co
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Filing: 1953-11-25
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Granted: 1957-03-19
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Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Harding
- 👤 Bruder Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:34
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14; C13B20/146; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE PROCESS OF PURIFIYING A SUCROSE SOLUTION WHICH CONTAINS DISSOLVED IMPURITIES INCLUDING COLOR-BODIES WHICH COMPRISES BRINGING SAID SOLUTION, AT A TEMPERATURE FROM 130* F. TO 210* F., INTO CONTACT WITH A PROOUS QUATERNARY AMMONIUM ANION-EXCHANGE RESIN WHICH IS IN THE SALT FORM.
Claim 2
Dependent Claim
42 words
THE PROCESS OF PURIFIYING A SUCROSE SOLUTION WHICH CONTAINS DISSOLVED IMPURITIES INCLUDING COLOR-BODIES WHICH COMPRISES BRINGING SAID SOLUTION, AT A TEMPERATURE FROM 130* F. TO 210* F., INTO CONTACT WITH A PROOUS QUATERNARY AMMONIUM ANION-EXCHANGE RESIN WHICH IS IN THE SALT FORM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |