US2425782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of filaments
Assignee: Celanese Corp
•
Filing: 1944-03-04
•
Granted: 1947-08-19
•
Expires: 1964-03-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Bludworth
- 👤 Hutson Canfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:05
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE175296C
Cited
US888260A
Cited
GB251680A
Cited
GB289233A
Cited
US1838121A
Cited
US2081171A
Cited
GB368230A
Cited
US1979403A
Cited
US2054852A
Cited
US2032606A
Cited
DE645696C
Cited
US2161354A
Cited
US2186135A
Cited
US2252684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |