US2356153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
beta-substituted-delta alpha,beta-gamma-butyrolactones and methods of preparing them
Assignee: Eli Lilly and Co
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Filing: 1941-03-21
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Granted: 1944-08-22
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Expires: 1961-03-21
Abstract
No abstract record available.
Inventors
- 👤 Robert C Elderfield
- 👤 Rubin Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:48
CPC Classifications
C; C07; C07D; C07D315/00; C07C; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/58
Claims Analysis
Total Claims: 0
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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) | 1947-08-22 | 1948-02-21 | 1948-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-22 | 1952-02-21 | 1952-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-22 | 1956-02-21 | 1956-08-22 | $7700.00 | Window Closed / Lapsed |