US3546743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die for extruding laminated plastic tube
Assignee: NORTHERN PETRO CHEM CO
•
Filing: 1968-04-26
•
Granted: 1970-12-15
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Expires: 1988-04-26
Abstract
No abstract record available.
Inventors
- 👤 Donald Jacob Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/09; B29C48/10; B29C48/14; B29C48/147; B29C48/1472; B29C48/16; B29C48/18; B29C48/21; B29C48/335; B29C48/337; B29C2791/00; B29C2791/004; B29C2791/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US830201A
Cited
US2736921A
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US2957201A
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US3102303A
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US3223761A
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US3218971A
Cited
US3419938A
Cited
US3315306A
Cited
US3447204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |