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Patent US1870408A successfully refreshed from Google Patents.
US1870408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloring of textile materials
Assignee: Celanese Corp
•
Filing: 1929-02-25
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Granted: 1932-08-09
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Expires: 1949-02-25
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Camille
- 👤 George W Miles
- 👤 Platt Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:03
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/0076; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
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) | 1935-08-09 | 1936-02-08 | 1936-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-09 | 1940-02-08 | 1940-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-09 | 1944-02-08 | 1944-08-09 | $7700.00 | Window Closed / Lapsed |