US3382536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw extruder
Assignee: Werner and Pfleiderer GmbH
•
Filing: 1966-02-11
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Granted: 1968-05-14
•
Expires: 1986-02-11
Abstract
No abstract record available.
Inventors
- 👤 Rudolf P Fritsch
- 👤 Bauer Erwin
- 👤 Gerhard H M May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:29
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/421; B29B7/428; B29B7/429; B29B7/46; B29B7/48; B29B7/482; B29B7/483; B29B7/488; B29B7/489; B29C; B29C48/00; B29C48/25; B29C48/268; B29C48/36; B29C48/395; B29C48/40; B29C48/402; B29C48/45; B29C48/50; B29C48/68; B29C48/76; B29C48/765; B29C48/766; B29C48/767; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92571; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92885; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2615199A
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US2595455A
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US2838794A
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US2970341A
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GB942260A
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US3078512A
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US3192564A
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FR1365788A
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GB981960A
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US3287477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |