Patent US3039695A successfully refreshed from Google Patents.
US2819296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydroxyalkyl acrylates
Assignee: Wyeth Holdings LLC
•
Filing: 1956-06-07
•
Granted: 1958-01-07
•
Expires: 1976-06-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Carnes
- 👤 Frank M Cowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; C08F20/18; C07; C07C; C07C67/00; C07C67/24; C07C67/26; C07C69/00; C07C69/52; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR THE PREPARATION OF AN HYDROXYALKYL ACRYLATE WHICH COMPRISES: BRINGING INTO REACTIVE COMBINATION FOR NOT MORE THAN ABOUT ONE HOUR APPROXIMATELY EQUIMOLECULAR AMOUNTS OF AN ALKYLENE OXIDE CONTAINING FROM TWO TO FOUR CARBON ATOMS AND A MONOCARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID IN THE PRESENCE OF A TERTIARY AMINE CATALYST AT TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 100*C. TO ABOUT 140*C. IN THE PRESENCE OF A WATERSOLUBLE ALKALI METAL NITRITE, AND RECOVERING THE CORRESPONDING HYDROXYALKYL ACRYLITE.
Claim 2
Dependent Claim
86 words
A PROCESS FOR THE PREPARATION OF AN HYDROXYALKYL ACRYLATE WHICH COMPRISES: BRINGING INTO REACTIVE COMBINATION FOR NOT MORE THAN ABOUT ONE HOUR APPROXIMATELY EQUIMOLECULAR AMOUNTS OF AN ALKYLENE OXIDE CONTAINING FROM TWO TO FOUR CARBON ATOMS AND A MONOCARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID IN THE PRESENCE OF A TERTIARY AMINE CATALYST AT TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 100*C. TO ABOUT 140*C. IN THE PRESENCE OF A WATERSOLUBLE ALKALI METAL NITRITE, AND RECOVERING THE CORRESPONDING HYDROXYALKYL ACRYLITE.
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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |