US3472804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insoluble films based on polyvinyl alcohol and process for the preparation thereof
Assignee: Ledoga SpA
•
Filing: 1966-05-16
•
Granted: 1969-10-14
•
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 07:23
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2127896A
Cited
GB494929A
Cited
US2250681A
Cited
US2385714A
Cited
US2439108A
Cited
GB584217A
Cited
US2448358A
Cited
US2514689A
Cited
US2867560A
Cited
US3316190A
Cited
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 |