Patent US2457791A successfully refreshed from Google Patents.
Patent US3274231A successfully refreshed from Google Patents.
US3274231A
Expired / Lapsed
US
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Compositions and methods of stabilizing unsaturated organic nitriles
Assignee: Asahi Kasei Corp
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Filing: 1963-06-13
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Granted: 1966-09-20
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Expires: 1983-06-13
Abstract
No abstract record available.
Inventors
- 👤 Kobayashi Tadahiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:07
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20; C07C17/00; C07C17/38; C07C17/42; C08; C08F; C08F2/00; C08F2/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A COMPOSITIN CONSISTING ESSENTIALLY OF A NITRILE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE AND DIMETHYLACRYLONITRILE, AND 0.5 TO 2,000 P.P.M. OF AT LEAST ONE STABILIZER SELECTED FROM THE GROUP CONSISTING OF ACETONETHIOSEMICARBAZONE, ACEPTOPHENONETHIOSEMICARBAZONE, ACETALDEHYDETHIOSEMICARBAZONE, ACETYTHIOSEMICARBAZIDE, PHENYLTHIOSEMICARBAZIDE, FORMYLTHIOSEMICARBAZIDE, CARBAMINYLTHIOSEMICARBAZIDE, THIOSEMICARBAZIDE, ACETONESEMICARBAZONE, ACETALDEHYDESEMICARBAZONE, ACETYLSEMICARBAZIDE, PHENYLSEMICABAZIDE, IONONESEMICARBAZONE AND SEMICARBAZIDE.
Claim 2
Dependent Claim
49 words
A COMPOSITIN CONSISTING ESSENTIALLY OF A NITRILE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE AND DIMETHYLACRYLONITRILE, AND 0.5 TO 2,000 P.P.M. OF AT LEAST ONE STABILIZER SELECTED FROM THE GROUP CONSISTING OF ACETONETHIOSEMICARBAZONE, ACEPTOPHENONETHIOSEMICARBAZONE, ACETALDEHYDETHIOSEMICARBAZONE, ACETYTHIOSEMICARBAZIDE, PHENYLTHIOSEMICARBAZIDE, FORMYLTHIOSEMICARBAZIDE, CARBAMINYLTHIOSEMICARBAZIDE, THIOSEMICARBAZIDE, ACETONESEMICARBAZONE, ACETALDEHYDESEMICARBAZONE, ACETYLSEMICARBAZIDE, PHENYLSEMICABAZIDE, IONONESEMICARBAZONE AND SEMICARBAZIDE.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |