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US2094770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of organic derivatives of cellulose
Assignee: Celanese Corp
•
Filing: 1933-09-21
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Granted: 1937-10-05
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Expires: 1953-09-21
Abstract
No abstract record available.
Inventors
- 👤 Ellis George Holland
- 👤 Olpin Henry Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:56
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/12; Y; Y10; Y10S; Y10S534/00; Y10S534/01
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) | 1940-10-04 | 1941-04-05 | 1941-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-10-04 | 1945-04-05 | 1945-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-10-04 | 1949-04-05 | 1949-10-05 | $7700.00 | Window Closed / Lapsed |