US2118856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture or treatment of artificial filaments, threads, yarns, and like materials
Assignee: Celanese Corp
•
Filing: 1936-10-28
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Granted: 1938-05-31
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Expires: 1956-10-28
Abstract
No abstract record available.
Inventors
- 👤 Moncrieff Robert Wighton
- 👤 Hill Frank Brentnall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:45
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/2496; Y10T137/2499
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) | 1941-05-30 | 1941-11-29 | 1942-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-05-30 | 1945-11-29 | 1946-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-05-30 | 1949-11-29 | 1950-05-31 | $7700.00 | Window Closed / Lapsed |