US2537981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a glycidyl ester
Assignee: Wyeth Holdings LLC
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Filing: 1949-10-28
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Granted: 1951-01-16
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Expires: 1969-10-28
Abstract
No abstract record available.
Inventors
- 👤 Edwards Phyllis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:38
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE METHOD OF PREPARING A GLYCIDYL ESTER OF AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID WHICH COMPRISES EFFECTING REACTION UNDER HEAT BETWEEN AN ALKALI-METAL SALT OF AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID AND EPICHLOROHYDRIN WHILE ADMIXED WITH A QUATERNARY AMMONIUM SALT AS A CATALYST FOR THE REACTION, SAID SALT BEING REPRESENTED BY THE GENERAL FORMULA
Claim 2
Independent Claim
52 words
THE METHOD OF PREPARING A GLYCIDYL ESTER OF AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID WHICH COMPRISES EFFECTING REACTION UNDER HEAT BETWEEN AN ALKALI-METAL SALT OF AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID AND EPICHLOROHYDRIN WHILE ADMIXED WITH A QUATERNARY AMMONIUM SALT AS A CATALYST FOR THE REACTION, SAID SALT BEING REPRESENTED BY THE GENERAL FORMULA
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) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |