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US3407157A
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US
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Tablet coating compositions comprising methyl vinyl ethermaleic anhydride copolymer,plasticizer and surface active agent
Assignee: F Hoffmann La Roche AG
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Filing: 1965-05-19
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Granted: 1968-10-22
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Carstensen Jens Thuroe
- 👤 Vance John James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/284; A61K9/282; C; C08; C08K; C08K5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2723248A
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US2897121A
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US2928769A
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US2925365A
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US2954323A
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US3143472A
Cited
US3149041A
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US3244596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |