Patent US2793100A successfully refreshed from Google Patents.
US2793100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of modifying carbon black
Assignee: Evonik Operations GmbH
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Filing: 1953-10-08
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Granted: 1957-05-21
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Expires: 1973-10-08
Abstract
No abstract record available.
Inventors
- 👤 Weihe Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:16
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C01; C01P; C01P2006/00; C01P2006/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS OF PRODUCING HIGH-GRADE COLORING BLACKS, WHICH COMPRISES THE STEPS OF SUBJECTING CARBON BLACK UNIFORMLY DISTRIBUTED IN AQUEOUS DISPERSION TO PHYSICAL DISINTEGRATION OF THE LARGER AGGREGATES OF CARBON BLACK PARTICLES BY GASES EVOLVED BY CHEMICAL DECOMPOSITION DUE TO HEATING OF GAS-GENERATING REAGENT DISSOLVED IN AQUEOUS PHASE OF THE DISPESION, SAID GAS-GENERATING REAGENT BEING SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRITE, UREA NITRITE, ALIPHATIC DIAZO COMPOUNS AND HYDROXYL AMINE.
Claim 2
Dependent Claim
70 words
A PROCESS OF PRODUCING HIGH-GRADE COLORING BLACKS, WHICH COMPRISES THE STEPS OF SUBJECTING CARBON BLACK UNIFORMLY DISTRIBUTED IN AQUEOUS DISPERSION TO PHYSICAL DISINTEGRATION OF THE LARGER AGGREGATES OF CARBON BLACK PARTICLES BY GASES EVOLVED BY CHEMICAL DECOMPOSITION DUE TO HEATING OF GAS-GENERATING REAGENT DISSOLVED IN AQUEOUS PHASE OF THE DISPESION, SAID GAS-GENERATING REAGENT BEING SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRITE, UREA NITRITE, ALIPHATIC DIAZO COMPOUNS AND HYDROXYL AMINE.
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) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |