US2877274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sodium methoxide
Assignee: EIDP Inc
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Filing: 1958-01-21
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Granted: 1959-03-10
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Expires: 1978-01-21
Abstract
No abstract record available.
Inventors
- 👤 Charles J Kramis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:34
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/68; C07C29/70; C12; C12C; C12C11/00; C12C11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
AN IMPROVED PROCESS FOR THE CONTINUOUS PREPARATION OF ALKALI METAL METHOXIDE IN A DISTILLATION COLUMN OPERATED AT SUBSTANTIALLY ATMOSPHERIC PRESSURE USING ONLY AQUEOUS ALKALI METAL HYDROXIDE AND GASEOUS METHANOL COMPRISING PASSING THE AQUEOUS ALKALI METAL HYDROXIDE DOWNWARDLY COUNTERCURRENTLY TO METHANOL PASSING UPWARDLY THROUGH A DISTILLATION COLUMN HAVING AT LEAST 10 THEORETICAL PLATES WHILE MAINTAINING THE TEMPERATURE IN THE TOP OF THE COLUMN AT THE BOILING POINT OF THE METHANOL AND WATER MIXTURE AND THE TEMPERATURE IN THE BOTTOM OF THE COLUMN AT THE BOILING POINT OF THE METHANOL AND ALKALI METAL METHOXIDE MIXTURE.
Claim 2
Dependent Claim
93 words
AN IMPROVED PROCESS FOR THE CONTINUOUS PREPARATION OF ALKALI METAL METHOXIDE IN A DISTILLATION COLUMN OPERATED AT SUBSTANTIALLY ATMOSPHERIC PRESSURE USING ONLY AQUEOUS ALKALI METAL HYDROXIDE AND GASEOUS METHANOL COMPRISING PASSING THE AQUEOUS ALKALI METAL HYDROXIDE DOWNWARDLY COUNTERCURRENTLY TO METHANOL PASSING UPWARDLY THROUGH A DISTILLATION COLUMN HAVING AT LEAST 10 THEORETICAL PLATES WHILE MAINTAINING THE TEMPERATURE IN THE TOP OF THE COLUMN AT THE BOILING POINT OF THE METHANOL AND WATER MIXTURE AND THE TEMPERATURE IN THE BOTTOM OF THE COLUMN AT THE BOILING POINT OF THE METHANOL AND ALKALI METAL METHOXIDE MIXTURE.
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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |