US2686775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process employing hydrazide/oxidant/copper salt initiator systems
Assignee: EIDP Inc
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Filing: 1951-03-29
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Granted: 1954-08-17
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Expires: 1971-03-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward G Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:14
CPC Classifications
C; C08; C08F; C08F4/00; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
IN THE POLYMERIZATION OF ACRYLONITRILE, THE IMPROVEMENT WHEREIN SAID MONOMER IS BROUGHT INTO CONTACT WITH AN ACYL HYDRAZINE, THE ACYL GROUP REPLACING A HYDRAZINE HYDROGEN, CUPRIC ION, AND AN OXIDIZING AGENT OF THE CLASS CONSISTING OF PERIODATE AND BROMATE IONS, PEROXY COMPOUNDS, VICINAL ALIPHATIC DIKETONES, AND QUINONES.
Claim 2
Dependent Claim
47 words
IN THE POLYMERIZATION OF ACRYLONITRILE, THE IMPROVEMENT WHEREIN SAID MONOMER IS BROUGHT INTO CONTACT WITH AN ACYL HYDRAZINE, THE ACYL GROUP REPLACING A HYDRAZINE HYDROGEN, CUPRIC ION, AND AN OXIDIZING AGENT OF THE CLASS CONSISTING OF PERIODATE AND BROMATE IONS, PEROXY COMPOUNDS, VICINAL ALIPHATIC DIKETONES, AND QUINONES.
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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |