US4010205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of a diketone derivative
Assignee: Firmenich SA
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Filing: 1974-11-26
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Granted: 1977-03-01
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Expires: 1994-11-26
Abstract
Abstract Process for the preparation of a diketone derivative useful as perfuming and taste-modifying agent as well as intermediate for the preparation of compounds having utility in the pharmaceutical and dye-stuff industry.
Inventors
- 👤 Joseph J. Becker
- 👤 Karl-Heinrich Schulte-Elte
- 👤 Hugo Strickler
- 👤 Gunther Ohloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:44
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; B; B01; B01J; B01J4/00; B01J4/001; C07C45/61; C07C45/67
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1,4-dione which comprises oxidizing, in a heterogeneous phase, 3,3,5-trimethyl-cyclohex-4-en-1-one by means of oxygen or an oxygen containing gas mixture, in the presence of a metal catalyst selected from the organic acid salts of a transition metal or copper which has been deposited on an inert solid support selected from silicon dioxide, carbon, magnesium or calcium carbonate or hydrogen-carbonate, and a diatomaceous earth.
Claim 2
Dependent Claim
68 words
A process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1,4-dione which comprises oxidizing, in a heterogeneous phase, 3,3,5-trimethyl-cyclohex-4-en-1-one by means of oxygen or an oxygen containing gas mixture, in the presence of a metal catalyst selected from the organic acid salts of a transition metal or copper which has been deposited on an inert solid support selected from silicon dioxide, carbon, magnesium or calcium carbonate or hydrogen-carbonate, and a diatomaceous earth.
References Cited (Backward Citations)
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US2819298A
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US2917539A
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US3070629A
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US3404185A
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GB1066709A
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US3385902A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |