US2647147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 2, 3-butadienylamines
Assignee: EIDP Inc
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Filing: 1950-12-13
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Granted: 1953-07-28
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Expires: 1970-12-13
Abstract
No abstract record available.
Inventors
- 👤 Vaughn A Engelhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:38
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
IN A PROCESS FOR THE PREPARATION OF AMINES HAVING ON THE AMINO NITROGEN A FOUR CARBON ALIPHATIC SUBSTITUENT OF THE CLASS CONSISTING OF THE 2,3-BUTADIENYL AND THE 3-BUTYNL SUBSTITUENTS BY REACTING MONOVINYLACETYLENE WITH NON-AROMATIC AMINE HAVING HYDROGEN ON AMINO NITROGEN, WHICH HYDROGEN IS THE ONLY ACTIVE HYDROGEN, HAVING NOT MORE THAN SIX CARBONS PER AMINO NITROGEN AND HAVING A SOLUBILITY IN WATER AT 25* C. OF AT LEAST 3.5%, THE IMPROVEMENT WHEREIN THE AMINE IS BROUGHT INTO CONTACT, IN AN AQUEOUS SYSTEM AT 50-200* C., WITH THE MONOVINYLACETRYLENE, SAID SYSTEM HAVING A BASE CONTENT IN AT LEAST 25% EXCESS OF THAT CORRESPONDING TO ONE MOLE AMINE PER MOLE OF MONOVINYLACETYLENE.
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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |