US2407503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding thermoplastic materials
Assignee: National Rubber Machinery Co
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Filing: 1941-01-21
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Granted: 1946-09-10
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Expires: 1961-01-21
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm A Magerkurth
- 👤 Hans E Buecken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/80; B29C48/84; B29C48/845; B29C48/36; B29C48/395; B29C48/82; B29C48/83; B29C48/832; B29C48/86; B29C48/865; B29C48/03; B29C48/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-09-09 | 1950-03-11 | 1950-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-09 | 1954-03-11 | 1954-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-09 | 1958-03-11 | 1958-09-10 | $7700.00 | Window Closed / Lapsed |