US2568621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing n-aryl substituted beta-amino carboxylic acids
Assignee: Goodrich Corp
•
Filing: 1950-06-01
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Granted: 1951-09-18
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Expires: 1970-06-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Gresham
- 👤 Forrest W Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:50
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/36; C07D213/38; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07D309/00; C07D309/16; C07D309/28; C07D309/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE METHOD WHICH COMPRISES REACTING IN AQUEOUS SOLUTION A BETA-LACTONE OF THE STRUCTURE
Claim 2
Independent Claim
13 words
THE METHOD WHICH COMPRISES REACTING IN AQUEOUS SOLUTION A BETA-LACTONE OF THE STRUCTURE
References Cited (Backward Citations)
US2502453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |