US2902515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of unsaturated aldehydes
Assignee: F Hoffmann La Roche AG
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Filing: 1958-03-10
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Granted: 1959-09-01
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Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Montavon Marc
- 👤 Saucy Gabriel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:10
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/14; C07C403/16; C07C17/00; C07C403/06; C07C403/08; C07C403/24; C07C45/00; C07C45/27; C07C45/29; C07C45/292; C07C45/61; C07C45/64; C07C45/67; C07C45/673; C07C45/676; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS OF MAKING AN A,B-UNSATURATED ALDEHYDE WHICH COMPRISES MIXING A 3,3-DISUBSTITUTED ALLYL HALIDE HAVING THE FORMULA B=C=CH-CH2-X WHEREIN THE SYMBOL X REPRESENTS A HALOGEN SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, AND THE SYMBOL GROUP B=C= REPRESENTS A DISUBSTITUTED METHYLENE RADICAL SELECTED FROM THE GROUP CONSISTING OF DIALKYLMETHYLENE, ALKYALKENYLMETHYLENE, CYCLOALKYLIDENE AND CYCLOALKYLIDENE SUBSTITUTED IN THE RING ONLY BY AT LEAST ONE SUBSTITUENT OF THE CLASS CONSISTING OF LOWER ALKYL, LOWER ALKOXY, LOWER ALKANOYLOXY, OXO AND ETHYLENEDIOXY, WITH AN ALKALI METAL SALT OF A LOWER ALKANENITRONIC ACID.
Claim 2
Dependent Claim
89 words
A PROCESS OF MAKING AN A,B-UNSATURATED ALDEHYDE WHICH COMPRISES MIXING A 3,3-DISUBSTITUTED ALLYL HALIDE HAVING THE FORMULA B=C=CH-CH2-X WHEREIN THE SYMBOL X REPRESENTS A HALOGEN SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, AND THE SYMBOL GROUP B=C= REPRESENTS A DISUBSTITUTED METHYLENE RADICAL SELECTED FROM THE GROUP CONSISTING OF DIALKYLMETHYLENE, ALKYALKENYLMETHYLENE, CYCLOALKYLIDENE AND CYCLOALKYLIDENE SUBSTITUTED IN THE RING ONLY BY AT LEAST ONE SUBSTITUENT OF THE CLASS CONSISTING OF LOWER ALKYL, LOWER ALKOXY, LOWER ALKANOYLOXY, OXO AND ETHYLENEDIOXY, WITH AN ALKALI METAL SALT OF A LOWER ALKANENITRONIC ACID.
References Cited (Backward Citations)
US702126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |