Patent US2901479A successfully refreshed from Google Patents.
US2901479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of new vat dyestuffs
Assignee: Bayer AG
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Filing: 1956-05-18
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Granted: 1959-08-25
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Expires: 1976-05-18
Abstract
No abstract record available.
Inventors
- 👤 Baumann Fritz
- 👤 Bien Hans-Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:53
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/24; C09B5/34; C09B5/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A DYESTUFF WHICH IS OBTAINED BY TREATING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DYESTUFFS FORMED BY (A) CONDENSING A BZ 1-BENZANTHRONYLAMINO-5-AMINO-1,1'' DIANTHRIMIDE WITH A COMPLEX COMPOUND OF ALUMINUM CHLORIDE AND A BASE OF THE GROUP CONSISTING OF AMINES AND AMMONIA AND (B) BY CONDENSING A BZ 1-BENZANTHRONYL-5-AMINO-1,1''-DIANTHRIMIDE CARBAZOL WITH ALCOHOLIC POTASSIUM HYDROXIDE, WITH CHLOROSULPHONIC ACID AT AN ELEVATED TEMPERATURE AND REACTING THE COMPOUND THUS OBTAINED WITH AN EXCESS OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMMONIA, MONOMETHYL AMINE, DIMETHYL AMINE, PIPERDINE, MORPHOLINE, 1,2,3,4-TETRAHYDROQUINOLINE AND ANILINE AT A TEMPERATURE UP TO ABOUT 100* C.
Claim 2
Dependent Claim
97 words
A DYESTUFF WHICH IS OBTAINED BY TREATING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DYESTUFFS FORMED BY (A) CONDENSING A BZ 1-BENZANTHRONYLAMINO-5-AMINO-1,1'' DIANTHRIMIDE WITH A COMPLEX COMPOUND OF ALUMINUM CHLORIDE AND A BASE OF THE GROUP CONSISTING OF AMINES AND AMMONIA AND (B) BY CONDENSING A BZ 1-BENZANTHRONYL-5-AMINO-1,1''-DIANTHRIMIDE CARBAZOL WITH ALCOHOLIC POTASSIUM HYDROXIDE, WITH CHLOROSULPHONIC ACID AT AN ELEVATED TEMPERATURE AND REACTING THE COMPOUND THUS OBTAINED WITH AN EXCESS OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMMONIA, MONOMETHYL AMINE, DIMETHYL AMINE, PIPERDINE, MORPHOLINE, 1,2,3,4-TETRAHYDROQUINOLINE AND ANILINE AT A TEMPERATURE UP TO ABOUT 100* C.
Claim 3
Dependent Claim
63 words
A DYESTUFF WHICH IS OBTAINED BY TREATING A DYESTUFF FORMED BY CONDENSING A BZ 1-BENZANTHRONYL-5-AMINO-1,1''DIANTHRIMIDE WITH A COMPLEX COMPOUND OF ALUMINUM CHLORIDE AND A BASE OF THE GROUP CONSISTING OF AMINES AND AMMONIA, WITH CHLOROSULPHONIC ACID AT AN ELEVATED TEMPERATURE, REACTING THE COMPOUND THUS OBTAINED WITH AN EXCESS OF MORPHOLINE AT A TEMPERATURE UP TO ABOUT 100* C. AND RECOVERING THE DYESTUFF FORMED.
Claim 4
Dependent Claim
63 words
A DYESTUFF WHICH IS OBTAINED BY TREATING A DYESTUFF FORMED BY CONDENSING A BZ 1-BENZANTHRONYL-5-AMINO-1,1''DIANTHRIMIDE WITH A COMPLEX COMPOUND OF ALUMINUM CHLORIDE AND A BASE OF THE GROUP CONSISTING OF AMINES AND AMMONIA, WITH CHLOROSULPHONIC ACID AT AN ELEVATED TEMPERATURE, REACTING THE COMPOUND THUS OBTAINED WITH AN EXCESS OF MORPHOLINE AT A TEMPERATURE UP TO ABOUT 100* C. AND RECOVERING THE DYESTUFF FORMED.
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |