Patent US2543345A successfully refreshed from Google Patents.
US2543345A
Expired / Lapsed
US
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Method of preparing glutamic acid amides
Assignee: Wyeth Holdings LLC
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Filing: 1949-04-25
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Granted: 1951-02-27
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Expires: 1969-04-25
Abstract
No abstract record available.
Inventors
- 👤 Waller Coy Webster
- 👤 Angier Robert Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:42
CPC Classifications
C; C07; C07C; C07C237/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A METHOD OF PREPARING COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
9 words
A METHOD OF PREPARING COMPOUNDS HAVING THE GENERAL 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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |