US3723486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of carboxylic esters
Assignee: Toray Industries Inc
•
Filing: 1971-10-21
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Granted: 1973-03-27
•
Expires: 1991-10-21
Abstract
Abstract Process for carbonylation of olefinically unsaturated hydrocarbons to produce carboxylic esters by reaction in the presence of a palladium complex represented by the general formula
Inventors
- 👤 T Kajimoto
- 👤 M Hara
- 👤 K Ohno
- 👤 S Wakamatsu
- 👤 R Nakanishi
- 👤 J Tsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A process was claimed in claim 1, wherein the amount of said palladium complex catalyst is 0.001 to 1 molar % based on said olefinically unsaturated hydrocarbons.
Claim 2
Dependent Claim
56 words
A process according to claim 1, wherein said palladium complex catalyst is prepared by heating at a temperature of 90* -200*C to dissolve a palladium compound selected from the group consisting of palladium chloride and complex salts of palladium chloride and 2 to 15 molar equivalents of triphenylphosphine in dichlorobenzene and permitting said compounds to react.
References Cited (Backward Citations)
US3437676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |