US3356443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixture of naphtholazobenzene and naphtholazotoluene and its production in granular form
Assignee: Wyeth Holdings LLC
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Filing: 1964-04-01
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Granted: 1967-12-05
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Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Dziomba Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:51
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/003; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR PREPARING A GRANULAR-FORM, OIL-SOLUBLE ORANGE DYE WHICH COMPRISES THE STEPS OF (1) DIAZOTIZING A MIXTURE COMPOSED OF FROM ABOUT 60 TO ABOUT 40 MOLE PERCENT ANILINE AND FROM ABOUT 40 TO ABOUT 60 MOLE PERCENT OF MIXED TOLUIDINES, THE TOTAL OF ANILINE AND MIXED TOLUIDINES IN SAID MIXTURE BEING 100%, (2) COUPLING THE RESULTING DIAZO PRODUCT UNDER CONVENTIONAL CONDITIONS TO BETA-NAPHTHOL, (3) HEATING THE COUPLING MIXTURE RAPIDLY TO FROM 90 TO 102*C. WITH AGITATION, (4) COOLING THE COUPLING MIXTURE QUICKLY TO BELOW 85*C., AND (5) ISOLATING THE GRANULAR DYE PRODUCT.
Claim 2
Dependent Claim
93 words
A PROCESS FOR PREPARING A GRANULAR-FORM, OIL-SOLUBLE ORANGE DYE WHICH COMPRISES THE STEPS OF (1) DIAZOTIZING A MIXTURE COMPOSED OF FROM ABOUT 60 TO ABOUT 40 MOLE PERCENT ANILINE AND FROM ABOUT 40 TO ABOUT 60 MOLE PERCENT OF MIXED TOLUIDINES, THE TOTAL OF ANILINE AND MIXED TOLUIDINES IN SAID MIXTURE BEING 100%, (2) COUPLING THE RESULTING DIAZO PRODUCT UNDER CONVENTIONAL CONDITIONS TO BETA-NAPHTHOL, (3) HEATING THE COUPLING MIXTURE RAPIDLY TO FROM 90 TO 102*C. WITH AGITATION, (4) COOLING THE COUPLING MIXTURE QUICKLY TO BELOW 85*C., AND (5) ISOLATING THE GRANULAR DYE PRODUCT.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |