US2506540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vanillin purification by distillation
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-05-29
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Granted: 1950-05-02
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Expires: 1968-05-29
Abstract
No abstract record available.
Inventors
- 👤 Collis C Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:48
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A PROCESS FOR THE RECOVERY OF VANILLIN IN HIGH YIELD AND PURITY FROM A CRUDE CONENTRATE, CONTAINING VANILLIN CONTAMINATED WITH COLORED, FLAVORED, AND OTHER IMPURITIES, THE STEPS COMPRISING SIMULTANEOUSLY DISTILLING THE CRUDE VANILLIN CONCENTRATE AND A LIQUID ALIPHATIC DISTILLING AID WHICH IS NON-REACTIVE WITH VANILLIN AND SUBSTANTIALLY A NON-SOLVENT FOR VANILLIN AT ROOM TEMPERATURE, SAID ALIPHATIC DISTILLING AID BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBONS AND CHLORO-ALIPHATIC HYDROCARBONS AND HAVING A BOILING RANGE WHEREIN THE ALIPHATIC DISTILLING AID SIMULTANEOUSLY DISTILLS WITH THE VANILLIN AT A TEMPERATURE WHICH DOES NOT EXCEED THE TEMPERATURE THAT CAUSES DEGRADATION OF THE VANILLIN, AND CONTINUING THE DISTILLATION UNTIL SUBSTANTIALLY ALL OF THE VANILLIN IS REMOVED IN THE MIXED VAPOR, THEN SEPARATING THE VANILLIN FROM SAID ALIPHATIC DISTILLING AID.
Claim 2
Dependent Claim
126 words
IN A PROCESS FOR THE RECOVERY OF VANILLIN IN HIGH YIELD AND PURITY FROM A CRUDE CONENTRATE, CONTAINING VANILLIN CONTAMINATED WITH COLORED, FLAVORED, AND OTHER IMPURITIES, THE STEPS COMPRISING SIMULTANEOUSLY DISTILLING THE CRUDE VANILLIN CONCENTRATE AND A LIQUID ALIPHATIC DISTILLING AID WHICH IS NON-REACTIVE WITH VANILLIN AND SUBSTANTIALLY A NON-SOLVENT FOR VANILLIN AT ROOM TEMPERATURE, SAID ALIPHATIC DISTILLING AID BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBONS AND CHLORO-ALIPHATIC HYDROCARBONS AND HAVING A BOILING RANGE WHEREIN THE ALIPHATIC DISTILLING AID SIMULTANEOUSLY DISTILLS WITH THE VANILLIN AT A TEMPERATURE WHICH DOES NOT EXCEED THE TEMPERATURE THAT CAUSES DEGRADATION OF THE VANILLIN, AND CONTINUING THE DISTILLATION UNTIL SUBSTANTIALLY ALL OF THE VANILLIN IS REMOVED IN THE MIXED VAPOR, THEN SEPARATING THE VANILLIN FROM SAID ALIPHATIC DISTILLING AID.
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) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |