US3907831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing lactones
Assignee: Firmenich SA
•
Filing: 1973-10-02
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Granted: 1975-09-23
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Expires: 1993-10-02
Abstract
Abstract New methods for the preparation of lactones possessing odoriferous properties and containing 14 to 17 ring carbon atoms in their molecule.
Inventors
- 👤 Joseph J Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:45
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/94
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
11 words
A METHOD FOR THE PREPARATION OF A COMPOUND OF THE FORMULA
Claim 2
Independent Claim
11 words
A METHOD FOR THE PREPARATION OF A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
26 words
A method according to claim 1 wherein the acidic agent is a mineraL or organic acid or an acidic diatomaceous earth in an inert organic solvent.
Claim 4
Dependent Claim
23 words
A method according to claim 1 wherein the reduction of compound (a) to compound (b) is carried out by means of sodium borohydride.
Claim 5
Dependent Claim
5 words
A compound having the formula
Claim 6
Dependent Claim
5 words
A compound having the formula
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |