US2819312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of polyene aldehydes
Assignee: F Hoffmann La Roche AG
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Filing: 1956-07-13
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Granted: 1958-01-07
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Expires: 1976-07-13
Abstract
No abstract record available.
Inventors
- 👤 Isler Otto
- 👤 Ruegg Rudolf
- 👤 Zeller Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:48
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/06; C07C403/10; C07C403/14; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5022; C07F9/54; C07F9/5442; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR THE MANUFACTURING OF POLYENE ALDEHYDES, WHICH COMPRISES CONDENSING IN AN INERT SOLVENT A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2,6,6-TRIMETH YLCYCLOHEXYLIDEN - ETHYLIDEN TRIARYLPHOSPHINE, 2,6,6-TRIMETHYLCYCLOHEXYLIDEN-ETHYLIDEN-TRI(ALKYL-SUBSTITUTED ARYL) PHOSPHINE AND 2,6,6-TRIMETHYLCYCLOHEXYLIDEN-ETHYLIDENTRI(ALKOXY-SUBSTITUTED ARYL) PHOSPHINE WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACETALS OF 2-OXOPROPANAL-(1), OF 4-OXOPENTENE-(2)-AL-(1) AND OF 2-METHYL-3-OXO-HEPTADIENE-(2,4)-AL-(1), HEATING THE REACTION MIXTURE AND HYDROLYZING THE ACETAL FORMED IN THE PRESENCE OF ACID.
Claim 2
Dependent Claim
66 words
A PROCESS FOR THE MANUFACTURING OF POLYENE ALDEHYDES, WHICH COMPRISES CONDENSING IN AN INERT SOLVENT A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2,6,6-TRIMETH YLCYCLOHEXYLIDEN - ETHYLIDEN TRIARYLPHOSPHINE, 2,6,6-TRIMETHYLCYCLOHEXYLIDEN-ETHYLIDEN-TRI(ALKYL-SUBSTITUTED ARYL) PHOSPHINE AND 2,6,6-TRIMETHYLCYCLOHEXYLIDEN-ETHYLIDENTRI(ALKOXY-SUBSTITUTED ARYL) PHOSPHINE WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACETALS OF 2-OXOPROPANAL-(1), OF 4-OXOPENTENE-(2)-AL-(1) AND OF 2-METHYL-3-OXO-HEPTADIENE-(2,4)-AL-(1), HEATING THE REACTION MIXTURE AND HYDROLYZING THE ACETAL FORMED IN THE PRESENCE OF ACID.
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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |