Patent US3436240A successfully refreshed from Google Patents.
US3436240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making high volatile carbon blacks
Assignee: Cabot Corp
•
Filing: 1965-12-28
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Granted: 1969-04-01
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Expires: 1985-12-28
Abstract
No abstract record available.
Inventors
- 👤 Joe Young Rogers Jr
- 👤 William H Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:36
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19664E
Cited
US2420810A
Cited
US3226244A
Cited
US3247003A
Cited
US3336148A
Cited
US3301694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |