US2072253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of textile materials made of or containing cellulose esters
Assignee: Celanese Corp
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Filing: 1933-05-19
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Granted: 1937-03-02
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Expires: 1953-05-19
Abstract
No abstract record available.
Inventors
- 👤 Ellis George Holland
- 👤 Wesson Alexander James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:25
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/58; D06M11/67; D06M11/51; D06M11/55; D06M11/56
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) | 1940-03-01 | 1940-08-31 | 1941-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-01 | 1944-08-31 | 1945-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-01 | 1948-08-31 | 1949-03-02 | $7700.00 | Window Closed / Lapsed |