Patent US2419281A successfully refreshed from Google Patents.
US2419281A
Expired / Lapsed
US
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Polyvinyl alcohol film
Assignee: EIDP Inc
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Filing: 1944-12-12
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Granted: 1947-04-22
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Expires: 1964-12-12
Abstract
No abstract record available.
Inventors
- 👤 Noble Max Vernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:14
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/68; B29C33/0033; C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-21 | 1950-10-21 | 1951-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-21 | 1954-10-21 | 1955-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-21 | 1958-10-21 | 1959-04-22 | $7700.00 | Window Closed / Lapsed |