US3246035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of non-vicinal aromatic diamines
Assignee: FMC Corp
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Filing: 1962-11-28
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Granted: 1966-04-12
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Expires: 1982-11-28
Abstract
No abstract record available.
Inventors
- 👤 Sylvan E Forman
- 👤 Lupichuk Andrew
- 👤 Square Hamilton
- 👤 Wachs Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:15
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/26; C08L; C08L75/00; C08L75/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR THE PREPARATION OF A NON-VICINAL ARYLENEDIAMINE SELECTED FROM THE GROUP CONSISTING OF PHENYLENEDIAMINE, ALKYL NUCLEAR-SUBSTITUTED PHENYLENEDIAMINES AND HALOGEN NUCLEAR-SUBSTITUTED PHENYLENEDIAMINES WHICH COMPRISES REACTING AN ISOMERIC MIXTURE CONTAINING VICINAL AND NON-VICINAL ISOMERS OF THE ARYLENEDIAMINE WITH AN AGENT SELECTED FROM THE GROUP CONSISTING OF DISTILLATION RESIDUES OBTAINED FROM THE DISTILLATION OF CRUDE TOLUENE DIISOYCANATE DERIVED FROM THE PHOSGENATION OF TOLUENEDIAMINE, AND UREAS OF THE FORMULA
Claim 2
Dependent Claim
67 words
A PROCESS FOR THE PREPARATION OF A NON-VICINAL ARYLENEDIAMINE SELECTED FROM THE GROUP CONSISTING OF PHENYLENEDIAMINE, ALKYL NUCLEAR-SUBSTITUTED PHENYLENEDIAMINES AND HALOGEN NUCLEAR-SUBSTITUTED PHENYLENEDIAMINES WHICH COMPRISES REACTING AN ISOMERIC MIXTURE CONTAINING VICINAL AND NON-VICINAL ISOMERS OF THE ARYLENEDIAMINE WITH AN AGENT SELECTED FROM THE GROUP CONSISTING OF DISTILLATION RESIDUES OBTAINED FROM THE DISTILLATION OF CRUDE TOLUENE DIISOYCANATE DERIVED FROM THE PHOSGENATION OF TOLUENEDIAMINE, AND UREAS OF THE FORMULA
References Cited (Backward Citations)
GB795639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |