Patent US2796443A successfully refreshed from Google Patents.
US2796443A
Expired / Lapsed
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Method for making anhydrous alkali metal alcoholates
Assignee: Dow Chemical Co
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Filing: 1956-03-12
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Granted: 1957-06-18
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Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Robert H Meyer
- 👤 Arthur K Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:50
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/68; C07C29/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR MAKING ANHYDROUS ALCOHOLIC SOLUTIONS OF ALKALI METAL ALCOHOLATES FROM WHICH SAID ALCOHOLATE MAY BE EASILY ISOLATED WHICH COMPRISES FORCING A LIQUID MONOHYDRIC AOCOHOL CONTAINING AT LEAST 2 CARBON ATOMS TO RISE THROUGH A BED OF SOLID PARTICLES OF ONE OF THE ALKALIES SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE AT A TEMPERATURE BETWEEN 70* AND 200*C. AT WHICH THE ALCOHOL IS LIQUID, AND RECOVERING AN ALCOHOL SOLUTION OF THE ANHYDROUS ALKALI METAL ALCOHOLATE OVERHEAD, WHILE DRAWING OFF CONCENTRATED AQUEOUS ALKALI METAL HYDROXIDE FROM BENEATH THE SAID BED, AND MAINTAINING THE SAID BED AT SUBSTANTIALLY CONSTANT VOLUME BY ADDITION OF SOLID ALKAI TO REPLACE THAT WHICH IS CONSUMED AND WITHDRAWN.
Claim 2
Dependent Claim
110 words
A PROCESS FOR MAKING ANHYDROUS ALCOHOLIC SOLUTIONS OF ALKALI METAL ALCOHOLATES FROM WHICH SAID ALCOHOLATE MAY BE EASILY ISOLATED WHICH COMPRISES FORCING A LIQUID MONOHYDRIC AOCOHOL CONTAINING AT LEAST 2 CARBON ATOMS TO RISE THROUGH A BED OF SOLID PARTICLES OF ONE OF THE ALKALIES SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE AT A TEMPERATURE BETWEEN 70* AND 200*C. AT WHICH THE ALCOHOL IS LIQUID, AND RECOVERING AN ALCOHOL SOLUTION OF THE ANHYDROUS ALKALI METAL ALCOHOLATE OVERHEAD, WHILE DRAWING OFF CONCENTRATED AQUEOUS ALKALI METAL HYDROXIDE FROM BENEATH THE SAID BED, AND MAINTAINING THE SAID BED AT SUBSTANTIALLY CONSTANT VOLUME BY ADDITION OF SOLID ALKAI TO REPLACE THAT WHICH IS CONSUMED AND WITHDRAWN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |