US1919592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing ar-tetrahydronaphthylamine compounds
Assignee: IG Farbenindustrie AG
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Filing: 1928-12-26
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Granted: 1933-07-25
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Expires: 1948-12-26
Abstract
No abstract record available.
Inventors
- 👤 Klingemann Felix
- 👤 Lommel Wilhelm
- 👤 Korten Ernst
- 👤 Goost Theodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:21
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/02
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) | 1936-07-24 | 1937-01-23 | 1937-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-24 | 1941-01-23 | 1941-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-24 | 1945-01-23 | 1945-07-25 | $7700.00 | Window Closed / Lapsed |