Patent US20030195628A1 successfully refreshed from Google Patents.
US2169976A
Expired / Lapsed
US
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Process of producing assistants in the textile and related industries
Assignee: IG Farbenindustrie AG
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Filing: 1935-01-17
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Granted: 1939-08-15
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Expires: 1955-01-17
Abstract
No abstract record available.
Inventors
- 👤 Guenther Fritz
- 👤 Saftien Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/75; C07; C07C; C07C291/00; C07C291/02; C07C291/04; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
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) | 1942-08-14 | 1943-02-13 | 1943-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-14 | 1947-02-13 | 1947-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-14 | 1951-02-13 | 1951-08-15 | $7700.00 | Window Closed / Lapsed |