Patent US3412009A successfully refreshed from Google Patents.
US3412009A
Expired / Lapsed
US
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Process for producing carbon black oil
Assignee: ConocoPhillips Co
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Filing: 1967-03-15
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Granted: 1968-11-19
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Expires: 1987-03-15
Abstract
No abstract record available.
Inventors
- 👤 John H Smith
- 👤 Jr Carl D Spangler
- 👤 Joseph R Kiovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:44
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C10; C10G; C10G9/00; C10G9/14
Claims Analysis
Total Claims: 0
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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) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |