US2016391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of artificial textile materials
Assignee: Celanese Corp
•
Filing: 1931-10-16
•
Granted: 1935-10-08
•
Expires: 1951-10-16
Abstract
No abstract record available.
Inventors
- 👤 Riley Reginald Henry John
- 👤 Barnett Theodore Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:26
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; D01; D01D; D01D5/00; D01D5/04; D01F; D01F2/00; D01F2/24; D01F2/28
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) | 1938-10-07 | 1939-04-08 | 1939-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-10-07 | 1943-04-08 | 1943-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-10-07 | 1947-04-08 | 1947-10-08 | $7700.00 | Window Closed / Lapsed |