Patent US2239408A successfully refreshed from Google Patents.
US2239408A
Expired / Lapsed
US
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Tuber for plastic materials
Assignee: ARCHIBALD L WALLACE
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Filing: 1937-06-07
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Granted: 1941-04-22
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Expires: 1957-06-07
Abstract
No abstract record available.
Inventors
- 👤 Archibald L Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:39
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/09; B29C48/15; B29C48/151
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-04-21 | 1944-10-21 | 1945-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-21 | 1948-10-21 | 1949-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-21 | 1952-10-21 | 1953-04-22 | $7700.00 | Window Closed / Lapsed |