US2849329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing water-insoluble coloring matters
Assignee: Hoechst AG
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Filing: 1955-06-07
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Granted: 1958-08-26
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Expires: 1975-06-07
Abstract
No abstract record available.
Inventors
- 👤 Braun Oskar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:40
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/008; C09B41/00; C09B41/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE MANUFACTURE OF A WATER-INSOLUBLE, NON-AQUEOUS POWDERED AZO-DYESTUFF PIGMENT HAVING A SOFT GRAIN, WHICH COMPRISES ADDING DURING THE COUPLING OPERATION TO FORM SAID DYESTUFF A MINERAL OIL IN SUCH A QUANTITY THAT THE MINERAL OIL CONTENT OF THE FINISHED DYESTUFF RANGES FROSM ABOUT 3% TO ABOUT 25% OF THE DYESTUFF, AND AS AN EMULSIFYING AGENT FOR THE MINERAL OIL A SULFONAMIDO ACETATE OF AN ALIPHATIC HYDROCARBON FRACTION BOILING BETWEEN ABOUT 150*C. AND 350*C.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE MANUFACTURE OF A WATER-INSOLUBLE, NON-AQUEOUS POWDERED AZO-DYESTUFF PIGMENT HAVING A SOFT GRAIN, WHICH COMPRISES ADDING DURING THE COUPLING OPERATION TO FORM SAID DYESTUFF A MINERAL OIL IN SUCH A QUANTITY THAT THE MINERAL OIL CONTENT OF THE FINISHED DYESTUFF RANGES FROSM ABOUT 3% TO ABOUT 25% OF THE DYESTUFF, AND AS AN EMULSIFYING AGENT FOR THE MINERAL OIL A SULFONAMIDO ACETATE OF AN ALIPHATIC HYDROCARBON FRACTION BOILING BETWEEN ABOUT 150*C. AND 350*C.
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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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |