Patent US2840077A successfully refreshed from Google Patents.
US2944286A
Expired / Lapsed
US
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Extrusion screw adjusting mechanism
Assignee: Blaw Knox Co
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Filing: 1958-10-14
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Granted: 1960-07-12
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Expires: 1978-10-14
Abstract
No abstract record available.
Inventors
- 👤 Gilbert V Kullgren
- 👤 Daniel W Stephenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:10
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/22; B30B11/24; B30B11/241; B29; B29C; B29C48/00; B29C48/03; B29C48/25; B29C48/252
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |