US2030252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of textile materials
Assignee: Celanese Corp
•
Filing: 1933-11-02
•
Granted: 1936-02-11
•
Expires: 1953-11-02
Abstract
No abstract record available.
Inventors
- 👤 Hale Frank Corbyn
- 👤 Tyce George Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:29
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/06; D01G1/08
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) | 1939-02-10 | 1939-08-12 | 1940-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-02-10 | 1943-08-12 | 1944-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-02-10 | 1947-08-12 | 1948-02-11 | $7700.00 | Window Closed / Lapsed |