Patent US2540475A successfully refreshed from Google Patents.
US2540475A
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Compositions comprising acrylonitrile polymers
Assignee: Akzo Nobel UK PLC
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Filing: 1947-08-25
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Granted: 1951-02-06
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Expires: 1967-08-25
Abstract
No abstract record available.
Inventors
- 👤 Dalton Masten Rufus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:31
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/096; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COMPOSITION OF MATTER COMPRISING AN ACRYLONITRILE POLYMER DISSOLVED IN A-CHLORO-BHYDROXY PROPIONITRILE.
Claim 2
Dependent Claim
12 words
A COMPOSITION OF MATTER COMPRISING AN ACRYLONITRILE POLYMER DISSOLVED IN A-CHLORO-BHYDROXY PROPIONITRILE.
References Cited (Backward Citations)
US2404726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |