Patent US2525084A successfully refreshed from Google Patents.
US2525084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of esters of beta-alk-oxy-gamma-aminocrotonates
Assignee: Rohm and Haas Co
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Filing: 1949-03-17
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Granted: 1950-10-10
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Expires: 1969-03-17
Abstract
No abstract record available.
Inventors
- 👤 John O Van Hook
- 👤 Willard J Croxall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:26
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07D295/145; C07D295/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS WHICH COMPRISES REACTING TOGETHER AT 20*C. TO 110*C. IN THE PRESENCE OF AN ANHYDROUS, STRONGLY BASIC CATALYST, WHICH CATALYST IS A MEMBER OF THE CLASS CONSISTING OF ALKALI METAL ACETYLIDES, ALKALI METAL ALCOHOLATES, AND QUATERNARY AMMONIUM ALCOHOLATES, THE QUATERNARY GROUP OF WHICH IS CAPABLE OF YIELDING A QUATERNARY AMMONIUM HYDROXIDE, A CARBONATE,
Claim 2
Dependent Claim
54 words
A PROCESS WHICH COMPRISES REACTING TOGETHER AT 20*C. TO 110*C. IN THE PRESENCE OF AN ANHYDROUS, STRONGLY BASIC CATALYST, WHICH CATALYST IS A MEMBER OF THE CLASS CONSISTING OF ALKALI METAL ACETYLIDES, ALKALI METAL ALCOHOLATES, AND QUATERNARY AMMONIUM ALCOHOLATES, THE QUATERNARY GROUP OF WHICH IS CAPABLE OF YIELDING A QUATERNARY AMMONIUM HYDROXIDE, A CARBONATE,
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) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |