US2041798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of artificial materials
Assignee: Celanese Corp
•
Filing: 1931-12-12
•
Granted: 1936-05-26
•
Expires: 1951-12-12
Abstract
No abstract record available.
Inventors
- 👤 Taylor William Ivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:01
CPC Classifications
D; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01F; D01F2/00; D01F2/24; D01F2/28; Y; Y10; Y10S; Y10S264/00; Y10S264/75
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) | 1939-05-26 | 1939-11-25 | 1940-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-26 | 1943-11-25 | 1944-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-26 | 1947-11-25 | 1948-05-26 | $7700.00 | Window Closed / Lapsed |