US3185708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused tricyclic lactones and their preparation
Assignee: RJ Reynolds Tobacco Co
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Filing: 1962-03-07
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Granted: 1965-05-25
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Expires: 1982-03-07
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Mims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:32
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/92; A; A24; A24B; A24B15/00; A24B15/18; A24B15/28; A24B15/30; A24B15/36; A24B15/40; A24B15/403; A24B15/406; C07D311/00; C07D311/02; C07D311/78; C07D311/92; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/947
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
A METHOD OF PREPARING 2,3,6,6A,7,8,9,10,10A,10BDECAHYDRO - 7,7,10A-TRIMETHYL-1H-NAPHTHO(2,1-B)PYRAN-3ONE AND 1,2,5,5A,6,7,8,9,9A,9B-DECAHYDRO-6,6,9A-TRIMETHYLNAPHTHO(2,1-B)FURAN-2-ONE WHICH COMPRISES HEATING IN THE PRESENCE OF MAGNESIUM SULFATE AND SODIUM SULFATE A HYDROCARBON SOLUTION OF SCLAREOL TO OBTAIN A MIXTURE OF SCLARENE ISOMERS, CONTACTING SAID MIXTURE OF SCLARENE ISOMERS IN ETHYL ACETATE SOLUTION WITH OZONE TO FORM AN OZONIDE, REMOVING ETHYL ACETATE FROM THE OZONIDE, REFLUXING SAID OZONIDE IN THE PRESENCE OF HYDROGEN PEROXIDE TO FORM AN OXIDATION PRODUCT, AND THEN REFLUXING THE SAID OXIDATION PRODUCT IN THE PRESENCE OF AN ACETIC ANHYDRIDE SOLVENT CONTAINING SODIUM ACETATE FOR A TIME SUFFICIENT TO FORM THE COMPOUNDS 2,3,6,6A,7,8,9,10,10A,10B-DECAHYDRO7,7,10A-TRIMETHYL-1H-NAPHTHO(2,1-B)PYRAN -3-ONE, AND 1,2, 5,5A,6,7,8,9,9A,9B - DECAHYDRO - 6,6,9A - TRIMETHYL-NAPHTHO (2,1-B)FURAN-2-ONE AND THEN SEPARATING SAID COMPOUNDS FROM THE REACTION MIXTURE.
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) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |