US1882813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts for the production of carbon black
Assignee: IG Farbenindustrie AG
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Filing: 1930-05-31
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Granted: 1932-10-18
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Expires: 1950-05-31
Abstract
No abstract record available.
Inventors
- 👤 Haag Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:01
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/54; B; B82; B82Y; B82Y30/00; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/127; D01F9/1273; D01F9/1278; D01F9/133
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) | 1935-10-18 | 1936-04-18 | 1936-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-10-18 | 1940-04-18 | 1940-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-10-18 | 1944-04-18 | 1944-10-18 | $7700.00 | Window Closed / Lapsed |