US2822348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester interchange catalysts
Assignee: EIDP Inc
•
Filing: 1951-11-14
•
Granted: 1958-02-04
•
Expires: 1971-11-14
Abstract
No abstract record available.
Inventors
- 👤 Haslam John Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:34
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/85
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
IN A PROCESS OF CONDUCTING AN ESTER INTERCHANGE REACTION BETWEEN AN ESTER OF A CARBOXYLIC ACID AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS AND ESTERS OF CARBOXYLIC ACIDS AS REACTANTS, SAID ESTER INTERCHANGE REACTION PRODUCING AN ESTER OTHER THAN THE FIRST-NAMED ESTER, THE IMPREOVEMENT WHICH COMPRISES INCORPORATING WITH THE REACTANTS A CATALYTIC AMOUNT OF AN ALKYL ORTHOTITANATE, AND EFFECTING THE ESTER INTERCHANGE REACTION.
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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |