US2528710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of acrylonitrile to white polymers in dimethyl formamide
Assignee: EIDP Inc
•
Filing: 1946-12-19
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Granted: 1950-11-07
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Expires: 1966-12-19
Abstract
No abstract record available.
Inventors
- 👤 Richards John Cadwallader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:48
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AS A NEW COMPOSITION OF MATTER, AN ACYLONITRILE POLYMER, DIMETHYL FORMAMIDE AND FROM ABOUT 0.5% TO ABOUT 25% OF A BORON TRIFLUORIDEDIMETHYL FORMANIDE COMPLEX.
Claim 2
Dependent Claim
24 words
AS A NEW COMPOSITION OF MATTER, AN ACYLONITRILE POLYMER, DIMETHYL FORMAMIDE AND FROM ABOUT 0.5% TO ABOUT 25% OF A BORON TRIFLUORIDEDIMETHYL FORMANIDE COMPLEX.
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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |