US2120267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of enhancing the colorability of cellulosic fiber
Assignee: IG Farbenindustrie AG
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Filing: 1933-09-18
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Granted: 1938-06-14
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Expires: 1953-09-18
Abstract
No abstract record available.
Inventors
- 👤 Schirm Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:38
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/22; D06P5/225; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6426; D06P1/651; D06P1/65106; D06P1/65112
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) | 1941-06-13 | 1941-12-13 | 1942-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-13 | 1945-12-13 | 1946-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-13 | 1949-12-13 | 1950-06-14 | $7700.00 | Window Closed / Lapsed |