Patent US3626938A successfully refreshed from Google Patents.
US3393427A
Expired / Lapsed
US
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Extrusion die
Assignee: Phillips Petroleum Co
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Filing: 1965-12-27
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Granted: 1968-07-23
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Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Olaf E Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/03; B29C48/09; B29C48/30; B29C48/32; B29C48/78; B29C48/86; B29C48/87
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3024494A
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US3095608A
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US3233286A
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CH391285A
Cited
US3270371A
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US3308509A
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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) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |