US2890491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding process for unplasticized polyvinyl chloride
Assignee: Tube Turns Plastics Inc
•
Filing: 1954-08-26
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Granted: 1959-06-16
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Expires: 1974-08-26
Abstract
No abstract record available.
Inventors
- 👤 James W Hendry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:14
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/53; B29C45/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2207426A
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US2338607A
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US2309729A
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US2252107A
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US2359840A
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US2413401A
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US2477258A
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US2505540A
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US2469342A
Cited
US2537182A
Cited
US2686935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |