US3340295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing a monoester of an alkylene glycol moiety and a carboxylic acid
Assignee: Celanese Corp
•
Filing: 1963-12-23
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Granted: 1967-09-05
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Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Edward N Wheeler
- 👤 Stearns Duane Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:27
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2615; C07; C07C; C07C67/00; C07C67/24; C07C67/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN THE PROCESS OF PORDUCING A MONOESTER OF A LOWER ALKYLENE GLYCOL MOIETY AND A CARBOXYLIC ACID, IN WHICH PROCESS A LOWER ALKYLENE OXIDE IS REACTED WITH A CARBOXYLIC ACID, THE IMPROVEMENT WHICH COMPRISES CATALYZING SAID REACTION WITH A BASIC ANION EXCHANGE RESIN IN THE FORM OF A SALT OF A CARBOXYLIC ACID.
Claim 2
Dependent Claim
53 words
IN THE PROCESS OF PORDUCING A MONOESTER OF A LOWER ALKYLENE GLYCOL MOIETY AND A CARBOXYLIC ACID, IN WHICH PROCESS A LOWER ALKYLENE OXIDE IS REACTED WITH A CARBOXYLIC ACID, THE IMPROVEMENT WHICH COMPRISES CATALYZING SAID REACTION WITH A BASIC ANION EXCHANGE RESIN IN THE FORM OF A SALT OF A CARBOXYLIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |