Patent US2612495A successfully refreshed from Google Patents.
US2612495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of effecting same
Assignee: —
•
Filing: —
•
Granted: 1952-09-30
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Expires: 1969-09-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:57
CPC Classifications
C; C09; C09B; C09B67/00; C07; C07C; C07C245/00; C07C245/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
A STABLE, DRY, NON-DUSTING DIAZONIUM COMPOSITION COMPRISING AN AROMATIC DIAZONIUM SALT COMBINED AS A COMPLEX DOUBLE SALT PARTIALLY WITH AN ANIONIC SURFACE-ACTIVE AGENT CONTAINING A HYDROPHOBIC GROUP SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC HYDROPHOBIC GROPS AND ALKYLAROMATIC GROUPS, AND AN AROMATICALLY LINKED HYDROPHILIC GROUP, AND PARTIALLY WITH A FAST COLOR SALT STABILIZER THE SURFACE-ACTIVE AGENT BEING PRESENT IN AN AMOUNT EQUAL TO AT LEAST 5% OF THE AMOUNT OF THE DIAZONIUM SALT, SAID COMPLEX DOUBLE SALT HAVING A CRYSTALLINE FORM SUCH THAT IT RETAINS LESS WATER IN A FILTER CAKE UPON FILTRATION OF AN AQUEOUS SUSPENSION THEREOF THAN A FILTER CAKE OF THE CORRESPONDING AROMATIC, DIAZONIUM SALT COMBINED AS A COMPLEX DOUBLE SALT SOLELY WITH SAID FAST COLOR SALT STABLIZER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |