Patent US6045508A successfully refreshed from Google Patents.
Patent US2525794A successfully refreshed from Google Patents.
US2525794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of beta-amino carboxylic acids by the reaction of ammonia with beta-lactones
Assignee: Goodrich Corp
•
Filing: 1948-05-21
•
Granted: 1950-10-17
•
Expires: 1968-05-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Gresham
- 👤 Forrest W Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:13
CPC Classifications
C; C07; C07C; C07C227/00; C07C227/14; C07C227/18; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD WHICH COMPRISES DISSOLVING A WATER-SOLUBLE, UNSUBSTITUTED, SATURATED ALIPHATIC BETA-LACTONE CONTAINIGN FROM 3 TO 6 CARBON ATOMS, IN A SOLVENT THEREFOR, SAID SOLVENT COMPRISING A LIQUID ORGANIC COMPOUND WHICH IS STABLE TO WATER AND POSSESSES A DEGREE OF IONIZATION THEREIN LESS THAN THAT OF AMMONIA, WHICH CONTAINS FROM 1 TO 12 CARBON ATOMS AND WHICH IS COMPOSED ENTIRELY OF ALIPHATIC HYDROCARBON STRUCTURE ATTACHED TO A SINGLE RADICAL SELECTED FROM THE CLASS CONSISTING OF -OH,
Claim 2
Independent Claim
75 words
THE METHOD WHICH COMPRISES DISSOLVING A WATER-SOLUBLE, UNSUBSTITUTED, SATURATED ALIPHATIC BETA-LACTONE CONTAINIGN FROM 3 TO 6 CARBON ATOMS, IN A SOLVENT THEREFOR, SAID SOLVENT COMPRISING A LIQUID ORGANIC COMPOUND WHICH IS STABLE TO WATER AND POSSESSES A DEGREE OF IONIZATION THEREIN LESS THAN THAT OF AMMONIA, WHICH CONTAINS FROM 1 TO 12 CARBON ATOMS AND WHICH IS COMPOSED ENTIRELY OF ALIPHATIC HYDROCARBON STRUCTURE ATTACHED TO A SINGLE RADICAL SELECTED FROM THE CLASS CONSISTING OF -OH,
References Cited (Backward Citations)
US2375005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |