Patent US1031932A successfully refreshed from Google Patents.
Patent US2543894A successfully refreshed from Google Patents.
US2543894A
Expired / Lapsed
US
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Screw press for mixing and extruding plastic materials
Assignee: Individual
•
Filing: 1948-02-21
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Granted: 1951-03-06
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Expires: 1968-02-21
Abstract
No abstract record available.
Inventors
- 👤 Colombo Roberto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:24
CPC Classifications
A; A01; A01J; A01J21/00; A01J21/02; B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/46; B29B7/48; B29B7/484; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/40; B29C48/402; B29C48/50; B29C48/505; B29C48/52; B29C48/525; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US837010A
Cited
GB180638A
Cited
US1718893A
Cited
US2048286A
Cited
US2119162A
Cited
US2262989A
Cited
US2384521A
Cited
US2411971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |