Patent US2979768A successfully refreshed from Google Patents.
US2979768A
Expired / Lapsed
US
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Apparatus for extrusion of plastics
Assignee: ROBERT F SCHNEE
•
Filing: 1957-02-21
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Granted: 1961-04-18
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Expires: 1977-02-21
Abstract
No abstract record available.
Inventors
- 👤 George B Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:50
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/03; B29C48/256
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195576A
Cited
US871261A
Cited
US1206150A
Cited
US1768790A
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US2449625A
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US2514211A
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US2595210A
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US2720679A
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US2661497A
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US2703434A
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US2738549A
Cited
US2728943A
Cited
US2837765A
Cited
US2760230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |