Patent US1616409A successfully refreshed from Google Patents.
US1616409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the manufacture of carbon black or lampblack
Assignee: J W TRIESCHMANN
•
Filing: 1926-01-19
•
Granted: 1927-02-01
•
Expires: 1946-01-19
Abstract
No abstract record available.
Inventors
- 👤 Elmer B Bird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:56
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1930-01-31 | 1930-08-02 | 1931-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-01-31 | 1934-08-02 | 1935-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-01-31 | 1938-08-02 | 1939-02-01 | $7700.00 | Window Closed / Lapsed |