US2105831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrogen cyanide
Assignee: IG Farbenindustrie AG
•
Filing: 1935-11-22
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Granted: 1938-01-18
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Expires: 1955-11-22
Abstract
No abstract record available.
Inventors
- 👤 Andrussow Leonid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:31
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0212; C01C3/0216
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) | 1941-01-17 | 1941-07-19 | 1942-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-01-17 | 1945-07-19 | 1946-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-01-17 | 1949-07-19 | 1950-01-18 | $7700.00 | Window Closed / Lapsed |