US1699255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for refining raw-carbon disulphide
Assignee: IG Farbenindustrie AG
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Filing: 1927-11-05
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Granted: 1929-01-15
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Expires: 1947-11-05
Abstract
No abstract record available.
Inventors
- 👤 Siedler Philipp
- 👤 Schulte Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:52
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/70
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) | 1932-01-15 | 1932-07-16 | 1933-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-01-15 | 1936-07-16 | 1937-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-01-15 | 1940-07-16 | 1941-01-15 | $7700.00 | Window Closed / Lapsed |