Patent US2648680A successfully refreshed from Google Patents.
US2648680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Office
Assignee: —
•
Filing: —
•
Granted: 1953-08-11
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Expires: 1970-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:27
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/18; C07D317/20; C07D319/00; C07D319/04; C07D319/06; C07D317/24; C07D493/00; C07D493/02; C07D493/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PREPARATION OF A HIGHER FATTY ACID ESTER OF A HYDROXYL BEARING CYCLIC ACETAL WHICH COMPRISES ESTERIFICATION OF A HYDROXYL BEARING CYCLIC ACETAL WITH A HIGHER FATTY ACID IN THE PRESENCE OF AN ALKALINE CATALYST.
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE PREPARATION OF A HIGHER FATTY ACID ESTER OF A HYDROXYL BEARING CYCLIC ACETAL WHICH COMPRISES ESTERIFICATION OF A HYDROXYL BEARING CYCLIC ACETAL WITH A HIGHER FATTY ACID IN THE PRESENCE OF AN ALKALINE CATALYST.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |