Patent US3235549A successfully refreshed from Google Patents.
US3480998A
Expired / Lapsed
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Extrusion hopper
Assignee: EIDP Inc
•
Filing: 1967-03-03
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Granted: 1969-12-02
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Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Robert Von Erdberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:30
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/21; B29C48/255; B29C48/2556; B29C48/307
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL294878A
Cited
US2628386A
Cited
US2761417A
Cited
US3080608A
Cited
US3235437A
Cited
US3218971A
Cited
US3308222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |