US2235208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloration of textile and other materials with anthraquinone dyestuffs
Assignee: Celanese Corp
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Filing: 1938-09-21
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Granted: 1941-03-18
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Expires: 1958-09-21
Abstract
No abstract record available.
Inventors
- 👤 Ellis George Holland
- 👤 Olpin Henry Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:34
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/50; C09B1/54; C09B1/545; C09B1/56; C09B1/58; C09B1/60; D; D06; D06P; D06P1/00; D06P1/38; D06P1/384; D06P3/00; D06P3/34; D06P3/40; D06P3/401; D06P3/42
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) | 1944-03-17 | 1944-09-16 | 1945-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-17 | 1948-09-16 | 1949-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-17 | 1952-09-16 | 1953-03-18 | $7700.00 | Window Closed / Lapsed |