US3232999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of nitrotoluene or nitrobenzene
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1964-12-28
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Granted: 1966-02-01
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Expires: 1984-12-28
Abstract
No abstract record available.
Inventors
- 👤 Brogden Michael Edward
- 👤 Milnes George
- 👤 Pinkerton Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:56
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
PROCESS FOR THE RECOVERY OF A NITRO COMPOUND SELECTED FROM THE GROUP CONSISTING OF A NITROTOLUENE AND NITROBENZENE DISSOLVED IN THE SPENT ACID REMANING AFTER NITRATION OF AN ORGANIC COMPOUND WITH MIXED NITRIC AND SULFURIC ACIDS COMPRISING CONTACTING THE SPENT ACID WITH A SOLVENT FOR SAID NITRO COMPOUND, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DICHLORIDE AND PROPYLENE DICHLORIDE AND EXTRACTING SAID NITRO COMPOUND FROM THE SPENT ACID.
Claim 2
Dependent Claim
71 words
PROCESS FOR THE RECOVERY OF A NITRO COMPOUND SELECTED FROM THE GROUP CONSISTING OF A NITROTOLUENE AND NITROBENZENE DISSOLVED IN THE SPENT ACID REMANING AFTER NITRATION OF AN ORGANIC COMPOUND WITH MIXED NITRIC AND SULFURIC ACIDS COMPRISING CONTACTING THE SPENT ACID WITH A SOLVENT FOR SAID NITRO COMPOUND, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DICHLORIDE AND PROPYLENE DICHLORIDE AND EXTRACTING SAID NITRO COMPOUND FROM THE SPENT ACID.
References Cited (Backward Citations)
US2435544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |