Patent US982625A successfully refreshed from Google Patents.
Patent US3472804A successfully refreshed from Google Patents.
US3472804A
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US
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Insoluble films based on polyvinyl alcohol and process for the preparation thereof
Assignee: Ledoga SpA
•
Filing: 1966-05-16
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Granted: 1969-10-14
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Expires: 1986-05-16
Abstract
No abstract record available.
Inventors
- 👤 Luciano Nobile
- 👤 Emanuele Condorelli
- 👤 Carlo Tesei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:59
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; B; B32; B32B; B32B27/00; C08L29/00; C08L29/02; C08L29/04; C09; C09D; C09D129/00; C09D129/02; C09D129/04; C08L3/00; C08L3/02; C08L5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB584217A
Cited
US2448358A
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US2514689A
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US3316190A
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US3219613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |