US2628249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esterification process
Assignee: Pittsburgh Coke and Chemical Co
•
Filing: 1951-01-03
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Granted: 1953-02-10
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Expires: 1971-01-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Anthony J Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:34
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/08; C08; C08K; C08K5/00; C08K5/04; C08K5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN THE PROCESS FOR THE PRODUCTION OF ESTERS, THE STEP WHICH COMPRISES CONDENSING A MATERIAL FROM THE GROUP CONSISTING OF CARBOXYLIC ACIDS AND ANHYDRIDES THEREOF WITH AN ALCOHOL IN THE PRESENCE OF A CATALYST COMPRISING A MIXTURE OF (1) A SULFUR-CONTAINING ACID FROM THE GROUP CONSISTING OF SULFURIC AND SULFONIC ACIDS, AND (2) ACTIVATED CARBON.
Claim 2
Dependent Claim
55 words
IN THE PROCESS FOR THE PRODUCTION OF ESTERS, THE STEP WHICH COMPRISES CONDENSING A MATERIAL FROM THE GROUP CONSISTING OF CARBOXYLIC ACIDS AND ANHYDRIDES THEREOF WITH AN ALCOHOL IN THE PRESENCE OF A CATALYST COMPRISING A MIXTURE OF (1) A SULFUR-CONTAINING ACID FROM THE GROUP CONSISTING OF SULFURIC AND SULFONIC ACIDS, AND (2) ACTIVATED CARBON.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |