US2777873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of esters of omega-amino acids
Assignee: Eastman Kodak Co
•
Filing: 1954-07-01
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Granted: 1957-01-15
•
Expires: 1974-07-01
Abstract
No abstract record available.
Inventors
- 👤 Robert H Hasek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:17
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A METHOD FOR THE PREPARATION OF W-AMINO ACID ESTERS WHICH COMPRISES HEATING AN ANHYDROUS ALDEHYDIC ESTER HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
20 words
A METHOD FOR THE PREPARATION OF W-AMINO ACID ESTERS WHICH COMPRISES HEATING AN ANHYDROUS ALDEHYDIC ESTER HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2546960A
Cited
US2636051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |