US2833809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acyclic, polynitrile-containing, unsaturated compounds and preparation thereof
Assignee: EIDP Inc
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Filing: 1955-10-21
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Granted: 1958-05-06
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Expires: 1975-10-21
Abstract
No abstract record available.
Inventors
- 👤 Middleton William Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07D295/145; C07C; C07C255/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA,
Claim 2
Dependent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA,
Claim 3
Dependent Claim
41 words
THE PROCESS FOR PREPARING A 2-AMINO-1,1,3,3-TETRACYANOPROPENE WHICH COMPRISES REACTING TETRACYANOETHYLENE WITH SODIOMALONONITRILE AND WITH A REACTANT SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND PRIMARY AND SECONDARY HYDROCARBON AMINES OF UP TO 18 CARBON ATOMS IN THE PRESENCE OF ANHYDROUS ALCOHOL.
Claim 4
Dependent Claim
41 words
THE PROCESS FOR PREPARING A 2-AMINO-1,1,3,3-TETRACYANOPROPENE WHICH COMPRISES REACTING TETRACYANOETHYLENE WITH SODIOMALONONITRILE AND WITH A REACTANT SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND PRIMARY AND SECONDARY HYDROCARBON AMINES OF UP TO 18 CARBON ATOMS IN THE PRESENCE OF ANHYDROUS ALCOHOL.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |