US2524414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic separation of carbohydrates
Assignee: Ohio State University Research Foundation
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Filing: 1946-06-26
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Granted: 1950-10-03
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Expires: 1966-06-26
Abstract
No abstract record available.
Inventors
- 👤 Melville L Wolfrom
- 👤 Baak W Lew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:57
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; C; C07; C07C; C07C51/00; C07C51/42; C07C51/47; C07C59/00; C07C59/01; C07C59/10; C07C59/105; C13; C13K; C13K13/00; C13K13/007; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222; Y10T436/143333
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD FOR THE SEPARATION OF WATER-SOLUBLE COLORLESS COMPOUNDS SELECTED FROM A GROUP CONSISTING OF THE WATER SOLUBLE CARBOHYDRATES, THE POLYHYDRIC ALCOHOLS, THE POLYHYDRIC ALCOHOL ANHYDRIDES, AND THE HYDROXY ACIDS, SAID COMPOUNDS HAVING DIFFERENT ADSORPTION AFFINITIES FOR A SOLID ADSORBENT, SELECTED FROM THE GROUP CONSISTING OF SILICA GEL, ACTIVATED ALUMINA, ACTIVATED CLAY AND ALKALINE EARTH SILICATES WHICH COMPRISES DISSOLVING SAID MATERIALS IN A SOLVENT WHICH HAS BOTH HYDROPHILE AND LIPOPHILE CHARACTER AND HAS SUFFICIENT HYDROPHILE CHARACTER THAT SAID POLYFUNCTIONAL MATERIALS ARE DISSOLVED AND SUFFICIENT LIPOPHILE CHARACTER THAT THE MATERIALS ARE AT THE TIME RETAINED ON THE COLUMN; DEVELOPING SAID SOLUTION ON SAID ADSORBENT WITH A DEVELOPER OF BOTH HYDROPHILE AND LIPOPILE CHARACTER, SAID DEVELOPER HAVING SUFFICIENT HYDROPHILE CHARACTER THAT SAID COLORLESS MATERIALS PROCEED THROUGH SAID ADSORBENT AT DIFFERENT RULES.
Claim 2
Independent Claim
129 words
A METHOD FOR THE SEPARATION OF WATER-SOLUBLE COLORLESS COMPOUNDS SELECTED FROM A GROUP CONSISTING OF THE WATER SOLUBLE CARBOHYDRATES, THE POLYHYDRIC ALCOHOLS, THE POLYHYDRIC ALCOHOL ANHYDRIDES, AND THE HYDROXY ACIDS, SAID COMPOUNDS HAVING DIFFERENT ADSORPTION AFFINITIES FOR A SOLID ADSORBENT, SELECTED FROM THE GROUP CONSISTING OF SILICA GEL, ACTIVATED ALUMINA, ACTIVATED CLAY AND ALKALINE EARTH SILICATES WHICH COMPRISES DISSOLVING SAID MATERIALS IN A SOLVENT WHICH HAS BOTH HYDROPHILE AND LIPOPHILE CHARACTER AND HAS SUFFICIENT HYDROPHILE CHARACTER THAT SAID POLYFUNCTIONAL MATERIALS ARE DISSOLVED AND SUFFICIENT LIPOPHILE CHARACTER THAT THE MATERIALS ARE AT THE TIME RETAINED ON THE COLUMN; DEVELOPING SAID SOLUTION ON SAID ADSORBENT WITH A DEVELOPER OF BOTH HYDROPHILE AND LIPOPILE CHARACTER, SAID DEVELOPER HAVING SUFFICIENT HYDROPHILE CHARACTER THAT SAID COLORLESS MATERIALS PROCEED THROUGH SAID ADSORBENT AT DIFFERENT RULES.
References Cited (Backward Citations)
US1170868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |