Patent US2806831A successfully refreshed from Google Patents.
US2806831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution of polyacrylonitrile color stabilized with tris(chloroethyl) phosphite
Assignee: Solutia Inc
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Filing: 1954-05-03
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Granted: 1957-09-17
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Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Beindorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:08
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
AS A NEW COMPOSITION OF MATTER, A STABILIZED SOLUTION OF AN ACRYLONITRILE POLYMER IN N,N-DIMETHYLACETAMIDE, SAID SOLUTION CONTAINING, AS A COLOR STABILIZER, TRIS(CHLOROETHYL)PHOSPHITE.
Claim 2
Dependent Claim
23 words
AS A NEW COMPOSITION OF MATTER, A STABILIZED SOLUTION OF AN ACRYLONITRILE POLYMER IN N,N-DIMETHYLACETAMIDE, SAID SOLUTION CONTAINING, AS A COLOR STABILIZER, TRIS(CHLOROETHYL)PHOSPHITE.
References Cited (Backward Citations)
US2656329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |