US2560504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demineralization of sucrose solutions by ion exchange
Assignee: Wyeth Holdings LLC
•
Filing: 1947-08-07
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Granted: 1951-07-10
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Expires: 1967-08-07
Abstract
No abstract record available.
Inventors
- 👤 Harold M Day
- 👤 Jr Arthur C Wrotnowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:40
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS WHICH COMPRISES BRINGING AN AQUEOUS SOLUTION CONTAINING SUGAR INTO CONTACT WITH A PAIR OF CATION AND ANION EXCHANGERS IN THAT ORDER, SAID CATION EXCHANGER HAVING PREVIOUSLY BEEN SUBSTANTIALLY COMPLETELY ACTIVATED WITH AMMONIUM IONS AND SAID ANION EXCHANGER BEING HYDROXYL ACTIVATED, AND SEPARATING THE SOLUTION FROM SAID EXCHANGERS.
Claim 2
Dependent Claim
49 words
A PROCESS WHICH COMPRISES BRINGING AN AQUEOUS SOLUTION CONTAINING SUGAR INTO CONTACT WITH A PAIR OF CATION AND ANION EXCHANGERS IN THAT ORDER, SAID CATION EXCHANGER HAVING PREVIOUSLY BEEN SUBSTANTIALLY COMPLETELY ACTIVATED WITH AMMONIUM IONS AND SAID ANION EXCHANGER BEING HYDROXYL ACTIVATED, AND SEPARATING THE SOLUTION FROM SAID EXCHANGERS.
References Cited (Backward Citations)
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Cited
US2104959A
Cited
US2171408A
Cited
FR805092A
Cited
US2288547A
Cited
GB542846A
Cited
US2388194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |