Patent US2989458A successfully refreshed from Google Patents.
US2989458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid carbon black feedstock
Assignee: Consolidation Coal Co
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Filing: 1958-05-13
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Granted: 1961-06-20
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Expires: 1978-05-13
Abstract
No abstract record available.
Inventors
- 👤 Metro D Kulik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:48
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A HYDROCARBONACEOUS CARBON BLACK FEEDSTOCK DERIVED FROM LIQUID PRODUCTS OBTAINED BY PYROLYSIS OF NATURALLY OCCURRING HYDROCARBONACEOUS SOLIDS, SAID PRODUCTS HAVING BEEN EXPOSED ONLY TO TEMPERATURES BELOW ABOUT 1400*F., COMPRISING SUBSTANTIALLY ALL OF THE SELECTIVE SOLVENT-SOLUBLE SOLIDS-FREE LIQUID CONSTITUENTS THEREOF BOILING ABOVE AN INITIAL BOILING TEMPERATURE IN THE RANGE OF 300 TO 425*C., SAID SELECTIVE SOLVENT CONSISTING ESSENTIALLY OF
Claim 2
Dependent Claim
58 words
A HYDROCARBONACEOUS CARBON BLACK FEEDSTOCK DERIVED FROM LIQUID PRODUCTS OBTAINED BY PYROLYSIS OF NATURALLY OCCURRING HYDROCARBONACEOUS SOLIDS, SAID PRODUCTS HAVING BEEN EXPOSED ONLY TO TEMPERATURES BELOW ABOUT 1400*F., COMPRISING SUBSTANTIALLY ALL OF THE SELECTIVE SOLVENT-SOLUBLE SOLIDS-FREE LIQUID CONSTITUENTS THEREOF BOILING ABOVE AN INITIAL BOILING TEMPERATURE IN THE RANGE OF 300 TO 425*C., SAID SELECTIVE SOLVENT CONSISTING ESSENTIALLY OF
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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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |