Patent US4562040A successfully refreshed from Google Patents.
Patent US2819258A successfully refreshed from Google Patents.
US2819258A
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Process for the manufacture of diazoamino-compounds in dry form
Assignee: BASF Schweiz AG
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Filing: 1954-08-20
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Granted: 1958-01-07
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Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
- 👤 Schmid Max
- 👤 Moser Eduard
- 👤 Bolleter Albert
- 👤 Schucan Hans Luzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:47
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0079; C09B67/0001; C09B67/0003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR THE MANUFACTURE OF DIAZOAMINO COMPOUNDS IN DRY FORM FROM AN AQUEOUS ALKALI SOLUTION WHICH CONTAINS, IN ADDITION TO A DIAZOAMINO COMPOUND, THE DIAZO COMPOUND OF WHICH IS FREE FROM SULFONIC AND CARBOXYLIC ACID GROUPS, SUBSTANTIALLY EQUIMOLECULAR PROPORTIONS OF THE CORRESPONDING FREE DIAZO COMPOUND AND OF, AS STABILIZED, THE CORRESPONDING FREE AMINE, WHEREIN THE SAID AQUEOUS SOLUTION IS SUBJECTED TO A RAPID DYING OPERATION OF THE ORDER OF AT MOST A FEW SECONDS.
Claim 2
Dependent Claim
75 words
A PROCESS FOR THE MANUFACTURE OF DIAZOAMINO COMPOUNDS IN DRY FORM FROM AN AQUEOUS ALKALI SOLUTION WHICH CONTAINS, IN ADDITION TO A DIAZOAMINO COMPOUND, THE DIAZO COMPOUND OF WHICH IS FREE FROM SULFONIC AND CARBOXYLIC ACID GROUPS, SUBSTANTIALLY EQUIMOLECULAR PROPORTIONS OF THE CORRESPONDING FREE DIAZO COMPOUND AND OF, AS STABILIZED, THE CORRESPONDING FREE AMINE, WHEREIN THE SAID AQUEOUS SOLUTION IS SUBJECTED TO A RAPID DYING OPERATION OF THE ORDER OF AT MOST A FEW SECONDS.
References Cited (Backward Citations)
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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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |