US2526702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of lactones
Assignee: Shell Development Co
•
Filing: 1948-09-20
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Granted: 1950-10-24
•
Expires: 1968-09-20
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:59
CPC Classifications
C; C07; C07D; C07D315/00; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/73; C07C47/00; C07C47/02; C07C47/198; C07D309/00; C07D309/16; C07D309/28; C07D309/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
THE LACTONES OF THE FORMULA
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) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |