US3488807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder with openable die head structure and die locking means
Assignee: Uniroyal GmbH
•
Filing: 1968-04-24
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Granted: 1970-01-13
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Expires: 1988-04-24
Abstract
No abstract record available.
Inventors
- 👤 Karl Vossen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:53
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/22; B30B11/221; B29; B29C; B29C48/00; B29C48/25; B29C48/256; B29C48/2562; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1947202A
Cited
US2486474A
Cited
US2773283A
Cited
IT592409B
Cited
US2897543A
Cited
US3407441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |