US2823226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of malondialdehyde derivatives
Assignee: Mitsubishi Chemical Corp
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Filing: 1954-08-16
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Granted: 1958-02-11
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Tsukamoto Tadashi
- 👤 Suzuki Tetsuya
- 👤 Heijo Kazuo
- 👤 Takebe Saburo
- 👤 Sudo Goichi
- 👤 Tanaka Yusuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:38
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
THE METHOD FOR PREPARING A MIXTURE OF MALONDIALDEHYDE DERIVATIVES HAVING, AS MAIN COMPONENT, 1.1.3TRIALKOXY-3-ACETOXYPROPANE, AND HAVING, AS OTHER COMPONENTS, 1.3-DIALKOXY-1.3-DIACETOXYPROPANE AND 1.1.3.3TETRAALKOXYPROPANE, ALL THE ALKOXY GROUPS OF SAID COMPOUNDS BEING LOWER ALKOXY, WHICH COMPRISES REACTING VINYLACETATE WITH ESTERS OF ORTHOFORMIC ACID IN THE MOLAR RATIO OF 0.5-1.5 TO SAID VINYLACETATE, IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF MERCURY FLUORIDE AND COMBINATION CATALYST OF MERCURY CATALYST AND ACIDIC FLUORIDE CATALYST, THE SAID ESTERS OF ORTHOFORMIC ACID BEING SELECTED FROM THE GROUP CONSISTING OF METHYL ORTHOFORMATE, ETHYL ORTHOFORMATE, PROPYL ORTHOFORMATE, BUTYL ORTHOFORMATE, DIMETHYLETHYL ORTHOFORMATE AND DIMETHYLPROPYL ORTHOFORMATE, THE SAID MERCURY CATALYST, ONE COMPONENT OF THE COMBINATION CATALYST, BEING SELECTED FROM THE GROUP CONSISTING OF MERCUROUS OXIDE, MERCURIC OXIDE, MERCUROUS NITRATE, MERCURIC NITRATE, MERCUROUS PHOSPHATE, MERCURIC PHOSPHATE, MERCUROUS ACETATE AND MERCURIC ACETATE, AND THE SAID ACIDIC FLUORINE CATALYST, THE OTHER COMPONENT OF SAID COMBINATION CATALYST, BEING SELECTED FROM THE GROUP CONSISTING OF BORON TRIFLUORIDE, BORON TRIFLUORIDE COMPLEXES, HYDROGEN FLUORIDE AND DIOXYFLUOBORIC ACID. 5. 1.1.3-TRIOXY-3-ACETOXYPROPANE, THE ALKOXY GROUPS BEING LOWER ALKOXY.
Claim 2
Independent Claim
172 words
THE METHOD FOR PREPARING A MIXTURE OF MALONDIALDEHYDE DERIVATIVES HAVING, AS MAIN COMPONENT, 1.1.3TRIALKOXY-3-ACETOXYPROPANE, AND HAVING, AS OTHER COMPONENTS, 1.3-DIALKOXY-1.3-DIACETOXYPROPANE AND 1.1.3.3TETRAALKOXYPROPANE, ALL THE ALKOXY GROUPS OF SAID COMPOUNDS BEING LOWER ALKOXY, WHICH COMPRISES REACTING VINYLACETATE WITH ESTERS OF ORTHOFORMIC ACID IN THE MOLAR RATIO OF 0.5-1.5 TO SAID VINYLACETATE, IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF MERCURY FLUORIDE AND COMBINATION CATALYST OF MERCURY CATALYST AND ACIDIC FLUORIDE CATALYST, THE SAID ESTERS OF ORTHOFORMIC ACID BEING SELECTED FROM THE GROUP CONSISTING OF METHYL ORTHOFORMATE, ETHYL ORTHOFORMATE, PROPYL ORTHOFORMATE, BUTYL ORTHOFORMATE, DIMETHYLETHYL ORTHOFORMATE AND DIMETHYLPROPYL ORTHOFORMATE, THE SAID MERCURY CATALYST, ONE COMPONENT OF THE COMBINATION CATALYST, BEING SELECTED FROM THE GROUP CONSISTING OF MERCUROUS OXIDE, MERCURIC OXIDE, MERCUROUS NITRATE, MERCURIC NITRATE, MERCUROUS PHOSPHATE, MERCURIC PHOSPHATE, MERCUROUS ACETATE AND MERCURIC ACETATE, AND THE SAID ACIDIC FLUORINE CATALYST, THE OTHER COMPONENT OF SAID COMBINATION CATALYST, BEING SELECTED FROM THE GROUP CONSISTING OF BORON TRIFLUORIDE, BORON TRIFLUORIDE COMPLEXES, HYDROGEN FLUORIDE AND DIOXYFLUOBORIC ACID. 5. 1.1.3-TRIOXY-3-ACETOXYPROPANE, THE ALKOXY GROUPS BEING LOWER ALKOXY.
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |