US1418385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing carbon black, lampblack, and hydrogen
Assignee: JULIAN M GERARD
•
Filing: 1920-07-17
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Granted: 1922-06-06
•
Expires: 1940-07-17
Abstract
No abstract record available.
Inventors
- 👤 Masson Henry James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:40
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/54
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) | 1925-06-05 | 1925-12-05 | 1926-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-06-05 | 1929-12-05 | 1930-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-06-05 | 1933-12-05 | 1934-06-06 | $7700.00 | Window Closed / Lapsed |