Patent US2719861A successfully refreshed from Google Patents.
US2719861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-amino-1, 3, 3-tricyano-2-propene and preparation of same
Assignee: EIDP Inc
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Filing: 1954-07-13
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Granted: 1955-10-04
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Expires: 1974-07-13
Abstract
No abstract record available.
Inventors
- 👤 Carboni Rudolph Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:38
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
3 words
THE COMPOUND, 2-AMINO-1,3,3-TRICYANO-2-PROPENE.
Claim 2
Dependent Claim
3 words
THE COMPOUND, 2-AMINO-1,3,3-TRICYANO-2-PROPENE.
Claim 3
Dependent Claim
74 words
PROCESS OF PREPARING 2-AMINO-1,3,3-TRICYANO-2PROPENE WHICH COMPRISES SUSPENDING AN ALKALI METAL DERIVATIVE OF MALONONITRILE IN AN INERT ORGANIC LIQUID FREE OF ACTIVE HYDROGENS AT A TEMPERATURE OF AT LEAST ABOUT 35* C. FOR A PERIOD OF AT LEAST 10 HOURS, REMOVING THE SOLID MATTER FROM SAID SUSPENSION, DISSOLVING SAID SOLID MATTER IN COLD WATER, AND ADDING SUFFICIENT STRONG MINERAL ACID TO SAID SOLUTION TO REACT WITH THE ALKALI METAL THEREIN AND THEREBY PRECIPITATE THE 2-AMINO-1,3,3-TRICYANO-2-PROPENE.
Claim 4
Dependent Claim
74 words
PROCESS OF PREPARING 2-AMINO-1,3,3-TRICYANO-2PROPENE WHICH COMPRISES SUSPENDING AN ALKALI METAL DERIVATIVE OF MALONONITRILE IN AN INERT ORGANIC LIQUID FREE OF ACTIVE HYDROGENS AT A TEMPERATURE OF AT LEAST ABOUT 35* C. FOR A PERIOD OF AT LEAST 10 HOURS, REMOVING THE SOLID MATTER FROM SAID SUSPENSION, DISSOLVING SAID SOLID MATTER IN COLD WATER, AND ADDING SUFFICIENT STRONG MINERAL ACID TO SAID SOLUTION TO REACT WITH THE ALKALI METAL THEREIN AND THEREBY PRECIPITATE THE 2-AMINO-1,3,3-TRICYANO-2-PROPENE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |