US2420810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of high volatile carbon black
Assignee: Godfrey L Cabot Inc
•
Filing: 1941-12-18
•
Granted: 1947-05-20
•
Expires: 1961-12-18
Abstract
No abstract record available.
Inventors
- 👤 Richard I Bray
- 👤 Gabry Jacob
- 👤 Jr Charles B Wendell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:01
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1191383A
Cited
US1497543A
Cited
US1632845A
Cited
US2005022A
Cited
US1989107A
Cited
US2312707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |