US1477511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making carbonblack
Assignee: Carbide and Carbon Chemicals Corp
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Filing: 1923-02-01
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Granted: 1923-12-11
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Expires: 1943-02-01
Abstract
No abstract record available.
Inventors
- 👤 Jr James W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:47
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-12-10 | 1927-06-11 | 1927-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-12-10 | 1931-06-11 | 1931-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-12-10 | 1935-06-11 | 1935-12-11 | $7700.00 | Window Closed / Lapsed |