Patent US2184622A successfully refreshed from Google Patents.
US2184622A
Expired / Lapsed
US
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Manufacture of tanning agents
Assignee: IG Farbenindustrie AG
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Filing: 1938-05-05
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Granted: 1939-12-26
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Expires: 1958-05-05
Abstract
No abstract record available.
Inventors
- 👤 Mauthe Gustav
- 👤 Noerr Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:15
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/24
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) | 1942-12-25 | 1943-06-26 | 1943-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-25 | 1947-06-26 | 1947-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-25 | 1951-06-26 | 1951-12-26 | $7700.00 | Window Closed / Lapsed |