US2745845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-formyl-2-dialkoxymethyl-succinic acid esters and their cyclization to heterocyclic compounds
Assignee: Eli Lilly and Co
•
Filing: 1950-06-30
•
Granted: 1956-05-15
•
Expires: 1970-06-30
Abstract
No abstract record available.
Inventors
- 👤 Reuben G Jones
- 👤 Edmund C Kornfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:31
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/38; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE PROCESS WHICH COMPRISES TREATING A 1-FORMYL-2DIALKOXYMETHYLSUCCINIC ACID ESTER OF THE FOLLOWING FORMULA
Claim 2
Dependent Claim
13 words
THE PROCESS WHICH COMPRISES TREATING A 1-FORMYL-2DIALKOXYMETHYLSUCCINIC ACID ESTER OF THE FOLLOWING FORMULA
References Cited (Backward Citations)
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GB594697A
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US2506536A
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US2562238A
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US2453676A
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US2630437A
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US2648685A
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US2535011A
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US2552978A
Cited
US2641601A
Cited
US2651639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |