US3507947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt extrusion process and spinnerettes
Assignee: Celanese Canada Inc
•
Filing: 1967-11-06
•
Granted: 1970-04-21
•
Expires: 1987-11-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph Mederic Grenier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:19
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1956564A
Cited
US1978163A
Cited
US1964659A
Cited
US3075241A
Cited
US2900708A
Cited
US2935550A
Cited
BE624280A
Cited
US3209402A
Cited
US3197812A
Cited
US3176342A
Cited
US3408277A
Cited
US3351695A
Cited
US3399259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |