Patent US2502106A successfully refreshed from Google Patents.
US2502106A
Expired / Lapsed
US
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Densifying of carbon black
Assignee: United Carbon Co Inc
•
Filing: 1944-12-21
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Granted: 1950-03-28
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Expires: 1964-12-21
Abstract
No abstract record available.
Inventors
- 👤 Robert W Skoog
- 👤 William F Seeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:23
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/60; C01; C01P; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US66377A
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US114050A
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US307275A
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USRE21379E
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US932789A
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US2120540A
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US2120541A
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US2131686A
Cited
US2288087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |