US2561695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of color from alkaline solutions
Assignee: Infilco Inc
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Filing: 1948-01-30
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Granted: 1951-07-24
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Expires: 1968-01-30
Abstract
No abstract record available.
Inventors
- 👤 Hilding B Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:48
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14; C13B20/146; B; B01; B01J; B01J41/00; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
33 words
THE METHOD OF REMOVING COLOR FROM AN ALKALINE SUGAR SOLUTION COMPRISING TREATING SAID ALKALINE SUGAR SOLUTION WITH AN ANION EXCHANGE MATERIAL REGENERATED WITH CAUSTIC AND A DILUTE SOLUTION OF A STRONG MINERAL ACID.
References Cited (Backward Citations)
US2228514A
Cited
US2301669A
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FR876930A
Cited
GB557690A
Cited
US2388224A
Cited
US2366651A
Cited
US2451272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |