US2503244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solutions of acrylonitrile polymers
Assignee: Eastman Kodak Co
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Filing: 1948-09-16
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Granted: 1950-04-11
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Expires: 1968-09-16
Abstract
No abstract record available.
Inventors
- 👤 Harry W Coover
- 👤 Theodore E Stanin
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:33
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/096; C08J2333/00; C08J2333/18; C08J2333/20; Y; Y10; Y10S; Y10S8/00; Y10S8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
AS A NEW COMPOSITION OF MATTER, A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST 80 PER CENT BY WEIGHT OF ACRYLONITRILE, N,N-DIMETHYLFORMAMIDE, AND FROM 0.1 TO 5.0 PER CENT BY WEIGHT, BASED ON THE WEIGHT OF THE N,N-DIMETHYLFORMAMIDE, OF AN INORGANIC PHOSPHORUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXYGEN ACIDS OF PHOSPHORUS AND OXIDES OF PHOSPHORUS.
Claim 2
Dependent Claim
60 words
AS A NEW COMPOSITION OF MATTER, A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST 80 PER CENT BY WEIGHT OF ACRYLONITRILE, N,N-DIMETHYLFORMAMIDE, AND FROM 0.1 TO 5.0 PER CENT BY WEIGHT, BASED ON THE WEIGHT OF THE N,N-DIMETHYLFORMAMIDE, OF AN INORGANIC PHOSPHORUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXYGEN ACIDS OF PHOSPHORUS AND OXIDES OF PHOSPHORUS.
References Cited (Backward Citations)
US2404728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |