US3054804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing gamma-stearolactone
Assignee: Individual
•
Filing: 1961-02-21
•
Granted: 1962-09-18
•
Expires: 1981-02-21
Abstract
No abstract record available.
Inventors
- 👤 Swern Daniel
- 👤 Joseph E Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:51
CPC Classifications
C; C07; C07D; C07D315/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR PREPARING Y-STEAROLACTONE COMPRISING COMBINING OLEIC ACID AND AN AQUEOUS PERCHLRIC ACID SOLUTION CONTAINING ABOUT FROM 65 TO 75% PERCHLORIC ACID, HEATING THE OLEIC ACID-AQUEOUS PERCHLORIC ACID REACTION MIXTURE AT A TEMPERATURE IN THE RANGE OF ABOUT FROM 90 TO 110*C. TO PRODUCE Y-STEAROLACTONE, AND SEPARATING Y-STEAROLACTONE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
53 words
A PROCESS FOR PREPARING Y-STEAROLACTONE COMPRISING COMBINING OLEIC ACID AND AN AQUEOUS PERCHLRIC ACID SOLUTION CONTAINING ABOUT FROM 65 TO 75% PERCHLORIC ACID, HEATING THE OLEIC ACID-AQUEOUS PERCHLORIC ACID REACTION MIXTURE AT A TEMPERATURE IN THE RANGE OF ABOUT FROM 90 TO 110*C. TO PRODUCE Y-STEAROLACTONE, AND SEPARATING Y-STEAROLACTONE FROM THE REACTION MIXTURE.
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) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |