Patent US3458902A successfully refreshed from Google Patents.
US3458902A
Expired / Lapsed
US
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Extrusion apparatus for thermoplastic materials
Assignee: Hercules LLC
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Filing: 1967-07-28
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Granted: 1969-08-05
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Expires: 1987-07-28
Abstract
No abstract record available.
Inventors
- 👤 Robert T Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:19
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/345; B29C48/03; B29C48/05; B29C48/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1516842A
Cited
US3114169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |