US2956926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated citric acid particles
Assignee: Wyeth Holdings LLC
•
Filing: 1958-09-23
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Granted: 1960-10-18
•
Expires: 1978-09-23
Abstract
No abstract record available.
Inventors
- 👤 Greif Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:30
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
44 words
FREE FLOWING POWDERED CITRIC ACID HAVING A PARTICLE SIZE AT LEAST AS FINE AS 30 MESH HAVING A PLURALITY OF THIN COATS OF A PREDOMINANTLY GLYCERIDE WAX, THE COATS BEING SUFFICIENT IN NUMBER SO THAT THE TOTAL WAX COATING IS IN EXCESS OF 5%.
Claim 2
Dependent Claim
44 words
FREE FLOWING POWDERED CITRIC ACID HAVING A PARTICLE SIZE AT LEAST AS FINE AS 30 MESH HAVING A PLURALITY OF THIN COATS OF A PREDOMINANTLY GLYCERIDE WAX, THE COATS BEING SUFFICIENT IN NUMBER SO THAT THE TOTAL WAX COATING IS IN EXCESS OF 5%.
Claim 3
Dependent Claim
19 words
A GELATIN CAPSULE FILLED WITH A FREE FLOWING POWDER COMPOSITION COMPRISING THE FREE FLOWING CITRIC ACID OF CLAIM 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |