Patent US2980708A successfully refreshed from Google Patents.
US2980708A
Expired / Lapsed
US
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Epoxy nitrile process
Assignee: Shell USA Inc
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Filing: 1959-06-25
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Granted: 1961-04-18
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Expires: 1979-06-25
Abstract
No abstract record available.
Inventors
- 👤 George B Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:08
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/226; C07; C07D; C07D303/00; C07D303/02; C07D303/48; C08G59/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
THE PROCESS FOR PREPARING A VIC-EPOXYALKYL NITRILE, WHILE COMPRISES REACTING AN UNSUBSTITUTED VIC-EPOXYALKYL ALDOXIME OF UP TO 8 CARBON ATOMS WITH A LOWER ALKYL ACIDIC REAGENT SELECTED FROM THE GROUP CONSISTING OF CARBOXYLIC ACIDS AND ANHYDRIDES THEREOF TO FORM THE ALKYL ESTER OF THE ALDOXIME, AND PYROLYZING THE OXIME ESTER AT A TEMPERATURE FROM ABOUT 100*C. TO ABOUT 200*C. TO PRODUCE THE VIC-EPOXYALKYL NITRILE.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |