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Patent US3449238A successfully refreshed from Google Patents.
US3449238A
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US
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Processing hydrocarbons containing carbon black
Assignee: BASF SE
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Filing: 1966-08-26
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Granted: 1969-06-10
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Expires: 1986-08-26
Abstract
No abstract record available.
Inventors
- 👤 Dieter Stockburger
- 👤 Richard Sinn
- 👤 Ludwig Raichle
- 👤 Karl Buschmann
- 👤 Wolf-Dieter Stege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:13
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C01; C01P; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |