US3385917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for extruding plastics
Assignee: Shell USA Inc
•
Filing: 1965-05-12
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Granted: 1968-05-28
•
Expires: 1985-05-12
Abstract
No abstract record available.
Inventors
- 👤 Carel J Breukink
- 👤 Vermeulen Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:58
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3442; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/25; B29C48/30; B29C48/32; B29C48/36; B29C48/362; B29C48/78; B29C48/80; B29C48/83; B29C48/834; B29C48/84; B29C48/85; B29C48/86; B29C48/88; B29C48/91; B29C2793/00; B29C2793/0063; B29C48/001; B29C48/0022; B29L; B29L2023/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2057467A
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US2633602A
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US2766480A
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US3024494A
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US3060505A
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US3304580A
Cited
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US3310617A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |