US2765491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion apparatus
Assignee: National Rubber Machinery Co
•
Filing: 1953-05-04
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Granted: 1956-10-09
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Expires: 1973-05-04
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm A Magerkurth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:57
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/68; B29C48/685; B29C48/686; B29C48/03; B29C48/395; B29C48/505; B29C48/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1904884A
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US2319859A
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US2519014A
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US2485854A
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US2595455A
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US2662243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |