US2526554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of beta-hydroxy carboxylic acid esters by alcoholysis of linear polyesters derived from beta-lactones
Assignee: Goodrich Corp
•
Filing: 1947-07-28
•
Granted: 1950-10-17
•
Expires: 1967-07-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Gresham
- 👤 Jansen Jacob Eden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:25
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/66; C07C69/67; C07C69/675; C07C69/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD OF PREPARING AN ESTER OF A BETAHYDROXY CARBOXYLIC ACID WHICH COMPRISES BRINGING TOGETHER AT REFLUX TEMPERATURE AND, IN THE PRESENCE OF AN ACID CATALYST, AN ALCOHOL OF THE FORMULA R''(OH)X, WHEREIN R'' IS A HYDROCARBON RADICAL AND X IS A NUMBER FROM 1 TO 4 WITH A LINEAR POLYESTER DERIVED FROM A SATURATED ALIPHATIC BETA-LACTONE AND CONTAINING A PLURALITY OF CONNECTED LACTONE UNITS OF THE FORMULA
Claim 2
Independent Claim
68 words
THE METHOD OF PREPARING AN ESTER OF A BETAHYDROXY CARBOXYLIC ACID WHICH COMPRISES BRINGING TOGETHER AT REFLUX TEMPERATURE AND, IN THE PRESENCE OF AN ACID CATALYST, AN ALCOHOL OF THE FORMULA R''(OH)X, WHEREIN R'' IS A HYDROCARBON RADICAL AND X IS A NUMBER FROM 1 TO 4 WITH A LINEAR POLYESTER DERIVED FROM A SATURATED ALIPHATIC BETA-LACTONE AND CONTAINING A PLURALITY OF CONNECTED LACTONE UNITS OF THE FORMULA
References Cited (Backward Citations)
US2361036A
Cited
US2396994A
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 |