US3486193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding thermoplastic material
Assignee: Phillips Petroleum Co
•
Filing: 1967-05-22
•
Granted: 1969-12-30
•
Expires: 1987-05-22
Abstract
No abstract record available.
Inventors
- 👤 J S Gwinn
- 👤 Don C Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:19
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/565; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3199147A
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US3300810A
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US3287477A
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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) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |