US2867540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified carbon black product and process
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-12-30
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Granted: 1959-01-06
•
Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 Harris Darrel Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:58
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE IMPROVEMENT OF CARBON BLACK WHICH COMPRISES MIXING CARBON BLACK WITH 0.15 TO 7.5 PERCENT BY WEIGHT OF AN AMINE, CALCULATED AS PERCENT NITROGEN, THE SAID AMINE HAVING FROM 2 TO 18 CARBON ATOMS, AND HEATING THE SAID MIXTURE TO A TEMPERATURE OF FROM 50* C. TO 350* C. IN THE PRESENCE OF OXYGEN.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE IMPROVEMENT OF CARBON BLACK WHICH COMPRISES MIXING CARBON BLACK WITH 0.15 TO 7.5 PERCENT BY WEIGHT OF AN AMINE, CALCULATED AS PERCENT NITROGEN, THE SAID AMINE HAVING FROM 2 TO 18 CARBON ATOMS, AND HEATING THE SAID MIXTURE TO A TEMPERATURE OF FROM 50* C. TO 350* C. IN THE PRESENCE OF OXYGEN.
References Cited (Backward Citations)
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Cited
US2178383A
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US2210763A
Cited
US2419512A
Cited
US2597741A
Cited
US2719092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |