US2946089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder with jointed feed screw
Assignee: National Rubber Machinery Co
•
Filing: 1957-11-27
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Granted: 1960-07-26
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Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 Eugene E Heston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:19
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/25; B29C48/256; B29C48/2564; B29C48/36; B29C48/50; B29C48/505; B29C48/58; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7075
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |