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US2671930A
Expired / Lapsed
US
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Filling extruder
Assignee: Onderzoekings Instituut Research
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Filing: 1952-11-06
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Granted: 1954-03-16
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Expires: 1972-11-06
Abstract
No abstract record available.
Inventors
- 👤 Kessler Jacob Christ Ferdinand
- 👤 Boetje Johannes
- 👤 Kohlwey Johann Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:22
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/25; B29C48/285; B29C48/288
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) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |