Patent US3423790A successfully refreshed from Google Patents.
US3423790A
Expired / Lapsed
US
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Extrusion apparatus
Assignee: Individual
•
Filing: 1965-07-08
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Granted: 1969-01-28
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Expires: 1985-07-08
Abstract
No abstract record available.
Inventors
- 👤 Ernesto Gabbrielli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
F; F16; F16L; F16L47/00; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2046541A
Cited
US2874411A
Cited
US3051990A
Cited
US3149377A
Cited
FR1382578A
Cited
US3281897A
Cited
US3228064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |