US2575006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixtures comprising polyacrylonitrile and polymeric ester-lactones
Assignee: Eastman Kodak Co
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Filing: 1950-04-29
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Granted: 1951-11-13
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Expires: 1970-04-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:34
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/18; C08L33/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A RESINOUS COMPOSITION COMPRISING FROM 60 TO 90 PER CENT BY WEIGHT OF POLYACRYLONITRILE AND FROM 40 TO 10 PER CENT BY WEIGHT OF AN ESTERLACTONE PREPARED BY HEATING TO REACTING TEMPERATURE ONE MOLECULAR PROPORTION OF AN EQUIMOLAR HETEROPOLYMER OF MALEIC ANHYDRIDE AND AN ESTER SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE AND ISOPROPENYL ACETATE, WITH FROM 2 TO 25 MOLECULAR PROPORTIONS OF A SATURATED MONOHYDRIC ALIPHATIC ALCOHOL CONTAINING FROM 1 TO 12 CARBON ATOMS IN THE PRESENCE OF AN ACID-ESTERIFICATION CATALYST.
Claim 2
Dependent Claim
83 words
A RESINOUS COMPOSITION COMPRISING FROM 60 TO 90 PER CENT BY WEIGHT OF POLYACRYLONITRILE AND FROM 40 TO 10 PER CENT BY WEIGHT OF AN ESTERLACTONE PREPARED BY HEATING TO REACTING TEMPERATURE ONE MOLECULAR PROPORTION OF AN EQUIMOLAR HETEROPOLYMER OF MALEIC ANHYDRIDE AND AN ESTER SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE AND ISOPROPENYL ACETATE, WITH FROM 2 TO 25 MOLECULAR PROPORTIONS OF A SATURATED MONOHYDRIC ALIPHATIC ALCOHOL CONTAINING FROM 1 TO 12 CARBON ATOMS IN THE PRESENCE OF AN ACID-ESTERIFICATION CATALYST.
References Cited (Backward Citations)
US2404714A
Cited
US2527863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |