US3425972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of water soluble trans parent films from dextrin and polyvinyl alcohol
Assignee: Ledoga SpA
•
Filing: 1967-04-27
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Granted: 1969-02-04
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Expires: 1987-04-27
Abstract
No abstract record available.
Inventors
- 👤 Luciano Nobile
- 👤 Carlo Alberto Tesei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:12
CPC Classifications
C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08K; C08K3/00; C08K3/10; C08L3/00; C08L3/02; C09; C09D; C09D129/00; C09D129/02; C09D129/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2439108A
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US2760942A
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US2850468A
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US3044974A
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US3133890A
Cited
US3034999A
Cited
US3329509A
Cited
US3279943A
Cited
US3316190A
Cited
US3324057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |