US1889429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black and process of making same
Assignee: Individual
•
Filing: 1927-12-02
•
Granted: 1932-11-29
•
Expires: 1947-12-02
Abstract
No abstract record available.
Inventors
- 👤 William B Wiegand
- 👤 Louis J Venuto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:16
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C09C1/40; C09C1/42; C09C3/00; C09C3/04; C09C3/045; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/50; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
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) | 1935-11-29 | 1936-05-30 | 1936-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-11-29 | 1940-05-30 | 1940-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-11-29 | 1944-05-30 | 1944-11-29 | $7700.00 | Window Closed / Lapsed |