Patent US2553331A successfully refreshed from Google Patents.
US2553331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methacrylonitrile process
Assignee: Honeywell International Inc
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Filing: 1948-07-29
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Granted: 1951-05-15
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Prill Erhard John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:44
CPC Classifications
C; C07; C07C; C07C253/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE PROCESS FOR THE PRODUCTION OF METHACRYLONITRILE WHICH COMPRISES HEATING UNDER ATMOSPHERIC PRESSURES A LIQUID REACTION MIXTURE CONTAINING ISOBUTYLENE-NITROSYL CHLORIDE ADDUCT AND AT LEAST A MOLAR EQUIVALENT, BASED ON SAID ADDUCT REGARDED AS A MONOMER, OF AN AROMATIC TERTIARY NITROGEN BASE CONTAINING THE PYRIDINE RING AND HAVING A HYDROCARBON RADICAL ATTACHED TO AT LEAST ONE OF THE ALPHA CARBON ATOMS OF THE PYRIDINE RING AND AT LEAST A MOLAR EQUIVALENT, BASED ON SAID ADDUCT REGARDED AS A MONOMER, OF A FATTY ACID ANHYDRIDE, AT TEMPERATURES AT WHICH METHACRYLONITRILE FORMED BY REACTION BETWEEN THE SAID REACTANTS DISTILS OUT OF THE REACTION MIXTURE.
Claim 2
Dependent Claim
101 words
THE PROCESS FOR THE PRODUCTION OF METHACRYLONITRILE WHICH COMPRISES HEATING UNDER ATMOSPHERIC PRESSURES A LIQUID REACTION MIXTURE CONTAINING ISOBUTYLENE-NITROSYL CHLORIDE ADDUCT AND AT LEAST A MOLAR EQUIVALENT, BASED ON SAID ADDUCT REGARDED AS A MONOMER, OF AN AROMATIC TERTIARY NITROGEN BASE CONTAINING THE PYRIDINE RING AND HAVING A HYDROCARBON RADICAL ATTACHED TO AT LEAST ONE OF THE ALPHA CARBON ATOMS OF THE PYRIDINE RING AND AT LEAST A MOLAR EQUIVALENT, BASED ON SAID ADDUCT REGARDED AS A MONOMER, OF A FATTY ACID ANHYDRIDE, AT TEMPERATURES AT WHICH METHACRYLONITRILE FORMED BY REACTION BETWEEN THE SAID REACTANTS DISTILS OUT OF THE REACTION MIXTURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |