US3336358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2-aminoethyl esters of methacrylic acid
Assignee: Dow Chemical Co
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Filing: 1964-07-23
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Granted: 1967-08-15
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Expires: 1984-07-23
Abstract
No abstract record available.
Inventors
- 👤 Russell T Mcfadden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:11
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A METHOD OF SEPARATING THE MINERAL ACID SALT OF AN AMINOETHYL ESTER OF METHACRYLIC ACID WHICH COMPRISES CONTACTING A SOLUTION IN A SATURATED OR MONO-OLEFINIC, ALIPHATIC HYDROCARBON SOLVENT OF AN AMINOETHYL ESTER OF METHACRYLIC ACID HAVING THE FORMULA
Claim 2
Independent Claim
38 words
A METHOD OF SEPARATING THE MINERAL ACID SALT OF AN AMINOETHYL ESTER OF METHACRYLIC ACID WHICH COMPRISES CONTACTING A SOLUTION IN A SATURATED OR MONO-OLEFINIC, ALIPHATIC HYDROCARBON SOLVENT OF AN AMINOETHYL ESTER OF METHACRYLIC ACID HAVING THE FORMULA
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |