US2914418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbon black from liquid hydrocarbons
Assignee: Texaco Inc
•
Filing: 1956-03-02
•
Granted: 1959-11-24
•
Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 Eastman Du Bois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:35
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
AS AN ARTICLE OF MANUFACTURE, A HYDROPHILIC CARBON BLACK PREPARED FROM A PETROLEUM OIL CONTAINING NATURALLY-OCCURRING HEAVY METAL COMPOUNDS, SAID CARBON BLACK CONTAINING COMPOUNDS OF SAID HEAVY METALS OF PETROLEUM ORIGIN COMPRISING VANADIUM AND HAVING A PH OF ABOUT 4; A VOLATILE CONTENT ON THE ORDER OF 5 TO 6 PERCENT; A MEANS PARTICLE DIAMETER OF THE ORDER OF 40 MILLIMICRONS; AND AN IRREGULAR PITTED SURFACE AND BRANCHED CHAIN STRUCTURE AS DETERMINED BY THE ELECTRON MICROSCOPE.
References Cited (Backward Citations)
US148778A
Cited
US1438032A
Cited
US1765991A
Cited
US1999573A
Cited
GB554155A
Cited
US2356471A
Cited
US2350846A
Cited
US2350847A
Cited
US2632713A
Cited
US2707672A
Cited
US2684896A
Cited
US2793938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |