US2579580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyanoethylation
Assignee: EIDP Inc
•
Filing: 1950-09-18
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Granted: 1951-12-25
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Expires: 1970-09-18
Abstract
No abstract record available.
Inventors
- 👤 Benjamin W Howk
- 👤 Carl M Langkammerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN THE PROCESS OF CYANOETHYLATION OF A COMPOUND CONTAINING A REACTIVE HYDROGEN ATOM WITH A CYANOETHYLATING AGENT TAKEN FROM THE GROUP CONSISTING OF ACRYLONITRILE AND ACRYLONITRILES HAVING ALIPHATIC HYDROCARBON SUBSTITUENTS OF ONE TO RYING OUT THE CYANOETHYLATION REACTION IN THE PRESENCE OF A CROSS-LINKED POLYQUATERNARY AMMONIUM HYDROXIDE RESIN.
Claim 2
Dependent Claim
48 words
IN THE PROCESS OF CYANOETHYLATION OF A COMPOUND CONTAINING A REACTIVE HYDROGEN ATOM WITH A CYANOETHYLATING AGENT TAKEN FROM THE GROUP CONSISTING OF ACRYLONITRILE AND ACRYLONITRILES HAVING ALIPHATIC HYDROCARBON SUBSTITUENTS OF ONE TO RYING OUT THE CYANOETHYLATION REACTION IN THE PRESENCE OF A CROSS-LINKED POLYQUATERNARY AMMONIUM HYDROXIDE RESIN.
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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |