Patent US2448978A successfully refreshed from Google Patents.
US2448978A
Expired / Lapsed
US
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Mixture of hydrolyzed ethylenevinyl ester copolymer and nu-substituted polyamide
Assignee: EIDP Inc
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Filing: 1944-12-14
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Granted: 1948-09-07
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Expires: 1964-12-14
Abstract
No abstract record available.
Inventors
- 👤 Hoover Fred Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:50
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2200429A
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US2169250A
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US2244184A
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US2275008A
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US2322888A
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GB562091A
Cited
US2338252A
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US2393972A
Cited
US2403464A
Cited
US2403465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |