Patent US3486853A successfully refreshed from Google Patents.
US3486853A
Expired / Lapsed
US
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Method for producing carbon black
Assignee: Phillips Petroleum Co
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Filing: 1966-12-23
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Granted: 1969-12-30
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Expires: 1986-12-23
Abstract
No abstract record available.
Inventors
- 👤 Eulas W Henderson
- 👤 Robert E Dollinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:30
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2917370A
Cited
US2800394A
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US3079236A
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US3076695A
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US3307911A
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US3256066A
Cited
US3342556A
Cited
US3410660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |