Patent US2321376A successfully refreshed from Google Patents.
Patent US2437685A successfully refreshed from Google Patents.
US2437685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the melt extrusion of artificial materials
Assignee: Celanese Corp
•
Filing: 1944-02-15
•
Granted: 1948-03-16
•
Expires: 1964-02-15
Abstract
No abstract record available.
Inventors
- 👤 Bonard Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:40
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/04; B; B28; B28B; B28B1/00; B28B1/02; Y; Y10; Y10S; Y10S164/00; Y10S164/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1769173A
Cited
US2133236A
Cited
US2278875A
Cited
US2303339A
Cited
US2303340A
Cited
US2289774A
Cited
US2303338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |