US2488587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating organic substitution derivative of cellulose textile materials
Assignee: Celanese Corp
•
Filing: 1945-06-07
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Granted: 1949-11-22
•
Expires: 1965-06-07
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Camile
- 👤 George W Seymour
- 👤 George C Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:22
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/80; D06M11/82; Y; Y10; Y10S; Y10S428/00; Y10S428/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1959350A
Cited
US2036854A
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US2038723A
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US2022411A
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US2072253A
Cited
US2121005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |