US2756222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of long-chain vinyl esters and ethers
Assignee: Individual
•
Filing: 1952-06-17
•
Granted: 1956-07-24
•
Expires: 1972-06-17
Abstract
No abstract record available.
Inventors
- 👤 Swern Daniel
- 👤 William S Port
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:30
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/007; C07C69/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR PURIFYING AN IMPURE POLYMERIZABLE MONOMER CONSISTING AS AN IMPURITY AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A POLYMERIZATION INHIBITOR, A CROSS-LINKING AGENT, AND A POLYMER OF THE SAID MONOMER, AND BEING SELECTED FROM THE GROUP CONSISTING OF A VINYL ESTER OF A STRAIGHT-CHAIN FATTY ACID HAVING FROM 6 TO 22 CARBON ATOMS IN THE FATTY ACID CHAIN AND A VINYL ETHER OF A STRAIGHT-CHAIN FATTY ACID HAVING FROM 6 TO 22 CARBON ATOMS IN THE FATTY ALCOHOL CHAIN, COMPRISING REACTING THE IMPURE MONOMER WITH UREA AT A TEMPERATURE OF ABOUT FROM 0* TO 50* C. TO FORM A COMPLEX OF THE UREA WITH THE PURE MONOMER, SEPARATING THE UREA COMPLEX FROM THE RESULTING REACTION MIXTURE, AND ISOLATING THE UREA FROM THE COMPLEX TO OBTAIN THE PURE MONOMER.
Claim 2
Dependent Claim
133 words
A PROCESS FOR PURIFYING AN IMPURE POLYMERIZABLE MONOMER CONSISTING AS AN IMPURITY AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A POLYMERIZATION INHIBITOR, A CROSS-LINKING AGENT, AND A POLYMER OF THE SAID MONOMER, AND BEING SELECTED FROM THE GROUP CONSISTING OF A VINYL ESTER OF A STRAIGHT-CHAIN FATTY ACID HAVING FROM 6 TO 22 CARBON ATOMS IN THE FATTY ACID CHAIN AND A VINYL ETHER OF A STRAIGHT-CHAIN FATTY ACID HAVING FROM 6 TO 22 CARBON ATOMS IN THE FATTY ALCOHOL CHAIN, COMPRISING REACTING THE IMPURE MONOMER WITH UREA AT A TEMPERATURE OF ABOUT FROM 0* TO 50* C. TO FORM A COMPLEX OF THE UREA WITH THE PURE MONOMER, SEPARATING THE UREA COMPLEX FROM THE RESULTING REACTION MIXTURE, AND ISOLATING THE UREA FROM THE COMPLEX TO OBTAIN THE PURE MONOMER.
References Cited (Backward Citations)
US2642423A
Cited
US2549372A
Cited
US2596344A
Cited
US2594481A
Cited
US2700036A
Cited
US2676955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |