US2002003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acetylene and carbon black
Assignee: IG Farbenindustrie AG
•
Filing: 1931-09-19
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Granted: 1935-05-21
•
Expires: 1951-09-19
Abstract
No abstract record available.
Inventors
- 👤 Eisenhut Otto
- 👤 Schilling Heinrich
- 👤 Baumann Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/54; C07; C07C; C07C2/00; C07C2/76; C07C2/80; C09C1/485
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) | 1938-05-20 | 1938-11-19 | 1939-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-20 | 1942-11-19 | 1943-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-20 | 1946-11-19 | 1947-05-21 | $7700.00 | Window Closed / Lapsed |