US3379554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray coating of pharmaceutical cores with a carboxylvinyl polymer and polyethylene glycol
Assignee: Merck and Co Inc
•
Filing: 1964-04-21
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Granted: 1968-04-23
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Expires: 1984-04-21
Abstract
No abstract record available.
Inventors
- 👤 Normand E Brindamour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:44
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/284; A61K9/2846; A61K9/2853
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2949402A
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US3011950A
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US3041243A
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US3139383A
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US3106492A
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US3141792A
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US3253944B1
Cited
US3253944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |