Patent DE229634C successfully refreshed from Google Patents.
US2553564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of hydracrylic acid and imino ethers
Assignee: Individual
•
Filing: 1948-04-16
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Granted: 1951-05-22
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Expires: 1968-04-16
Abstract
No abstract record available.
Inventors
- 👤 Martin L Fein
- 👤 Charles H Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:55
CPC Classifications
C; C07; C07C; C07C59/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS COMPRISING REACTING AN ALCOHOL WITH ETHYLENE CYANOHYDRIN AND HYDROGEN CHLORIDE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, CONTACTING THE RESULTING PRODUCT WITH WATER TO PRODUCE AN ESTER OF HYDRACRYLIC ACID CORRESPONDING TO THE ALCOHOL USED AS THE REACTANT, AND RECOVERING THE FORMED ESTER OF HYDRACRYLIC ACID.
Claim 2
Dependent Claim
45 words
A PROCESS COMPRISING REACTING AN ALCOHOL WITH ETHYLENE CYANOHYDRIN AND HYDROGEN CHLORIDE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, CONTACTING THE RESULTING PRODUCT WITH WATER TO PRODUCE AN ESTER OF HYDRACRYLIC ACID CORRESPONDING TO THE ALCOHOL USED AS THE REACTANT, AND RECOVERING THE FORMED ESTER OF HYDRACRYLIC ACID.
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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |