US1955239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of viscose
Assignee: IG Farbenindustrie AG
•
Filing: 1931-07-18
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Granted: 1934-04-17
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Expires: 1951-07-18
Abstract
No abstract record available.
Inventors
- 👤 Dr Adolf Kaempf
- 👤 Dr Heinrich Fink
- 👤 Dr Arno Matthes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:45
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/84; H04N5/843; H04N5/846; D; D01; D01F; D01F2/00; D01F2/06; D01F2/08
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) | 1937-04-16 | 1937-10-16 | 1938-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-16 | 1941-10-16 | 1942-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-16 | 1945-10-16 | 1946-04-17 | $7700.00 | Window Closed / Lapsed |