US3867459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of penta-2,4-dien-1-als and related trienals
Assignee: BASF SE
•
Filing: 1973-11-05
•
Granted: 1975-02-18
•
Expires: 1993-11-05
Abstract
Abstract Manufacture of penta-2,4-dien-1-als comprising the reaction of propargyl alcohols with Alpha -formylcarboxylic esters at temperatures of from 100* to 350* C. Penta-2,4-dien-1-als are odorants.
Inventors
- 👤 Werner Hoffmann
- 👤 Walter Himmele
- 👤 Werner Aquila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/673; C07C45/676; C07C45/68; C07C47/00; C07C47/20; C07C47/21; C07C47/277; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
11 words
A PROCESS FOR THE MANUFACTURE OF A PENTA-2,4-DIEN-1-AL OF THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE MANUFACTURE OF A PENTA-2,4-DIEN-1-AL OF THE FORMULA
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 wherein the starting material is a propargyl alcohol of the formula
Claim 4
Dependent Claim
13 words
A process as claimed in claim 1 wherein methyl Alpha -formylpropionate is used.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 1 wherein a temperature of from 120* to 220* C is used.
Claim 6
Dependent Claim
26 words
A process as claimed in claim 1 wherein from 1.2 to 2.5 moles of an Alpha -formylcarboxylic ester are used per mole of the propargyl alcohol.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |