US2558875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine substituted amines
Assignee: Akzo Nobel UK PLC
•
Filing: 1947-03-24
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Granted: 1951-07-03
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Expires: 1967-03-24
Abstract
No abstract record available.
Inventors
- 👤 Frank G Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:18
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60; C07C21/00; C07C21/22; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS COMPRISING THE STEPS OF REACTING HEXAFLUOROBUTYNE WITH AN AMINE SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXYLAMINE AND PRIMARY AND SECONDARY LOWER ALKYL AMINES IN THE ABSENCE OF A CATALYST, AT ROOM TEMPERATURE AND UNDER ATMOSPHERIC PRESSURE, AND DISTILLING THE REACTION PRODUCT.
Claim 2
Dependent Claim
43 words
A PROCESS COMPRISING THE STEPS OF REACTING HEXAFLUOROBUTYNE WITH AN AMINE SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXYLAMINE AND PRIMARY AND SECONDARY LOWER ALKYL AMINES IN THE ABSENCE OF A CATALYST, AT ROOM TEMPERATURE AND UNDER ATMOSPHERIC PRESSURE, AND DISTILLING THE REACTION PRODUCT.
References Cited (Backward Citations)
GB510457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |