US2517800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing alpha-irone isomers by cyclization of pseudoirones
Assignee: Givaudan Roure Corp
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Filing: 1948-08-31
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Granted: 1950-08-08
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Expires: 1968-08-31
Abstract
No abstract record available.
Inventors
- 👤 Naves Yves-Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:36
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/14; C07C403/16; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
IN THE PROCESS FOR PREPARING METHYL-6, ALPHA-IONONES RICH IN THE STEREOISOMER THE PHENYL4-SEMICARBAZONE OF WHICH MELTS AT 164.5-165*C., THE IMPROVEMENT WHICH COMPRISES TREATING UNDER ANHYDROUS CONDITIONS THE METHYL-3-PSEUDOIONONES WITH BORON TRIFLUORIDE.
Claim 2
Dependent Claim
31 words
IN THE PROCESS FOR PREPARING METHYL-6, ALPHA-IONONES RICH IN THE STEREOISOMER THE PHENYL4-SEMICARBAZONE OF WHICH MELTS AT 164.5-165*C., THE IMPROVEMENT WHICH COMPRISES TREATING UNDER ANHYDROUS CONDITIONS THE METHYL-3-PSEUDOIONONES WITH BORON TRIFLUORIDE.
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |