Patent US2324712A successfully refreshed from Google Patents.
US2324712A
Expired / Lapsed
US
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Dialkyl esters of n-substituted aspartic acid and method of preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1940-09-25
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Granted: 1943-07-20
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Expires: 1960-09-25
Abstract
No abstract record available.
Inventors
- 👤 Kathryn L Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:29
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
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) | 1946-07-19 | 1947-01-18 | 1947-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-07-19 | 1951-01-18 | 1951-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-07-19 | 1955-01-18 | 1955-07-20 | $7700.00 | Window Closed / Lapsed |