Patent US2415072A successfully refreshed from Google Patents.
US2415072A
Expired / Lapsed
US
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Carbon black product and process of producing the same
Assignee: Godfrey L Cabot Inc
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Filing: 1941-08-15
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Granted: 1947-02-04
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Expires: 1961-08-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Owen J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:38
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1516337A
Cited
US2120540A
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US2164164A
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US2178382A
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US2167674A
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US2187601A
Cited
US2213059A
Cited
US2228704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |