US2757124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tablets and method of producing same
Assignee: Merck and Co Inc
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Filing: 1952-03-08
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Granted: 1956-07-31
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Expires: 1972-03-08
Abstract
No abstract record available.
Inventors
- 👤 Wolff John Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/282; A61K9/2826; A61J; A61J3/00; A61J3/005; A61K9/2072; A61K9/2086; A61K9/209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF COATING MEDICINAL TABLETS WHICH COMPRISES COMPRESSING A CORE TABLET OF GRANULAR MATERIAL TO A FIRM CONDITION BUT WHICH IS STILL CAPABLE OF FURTHER APPRECIABLE COMPRESSION, APPLYING A UNIFORM LAYER OF FREEFLOWING DRY GRANULAR MATERIAL HAVING BONDING CHARACTERISTICS OVER THE CORE TABLET IN A DIE, AND APPLYING TO THE GRANULAR COATING MATERIAL SUCH A COMPRESSIVE FORCE AS TO COMPRESS THE COATING ON THE CORE TABLET AND DIMINISH THE THICKNESS OF THE CORE TABLET AT LEAST 8%, WHEREBY THE PARTICLES OF GRANULAR MATERIAL ARE INTERMINGLED AT THE INTERFACE RESULTING IN A FIRM BONDING OF THE COATING TO THE CORE TABLET.
Claim 2
Independent Claim
101 words
THE METHOD OF COATING MEDICINAL TABLETS WHICH COMPRISES COMPRESSING A CORE TABLET OF GRANULAR MATERIAL TO A FIRM CONDITION BUT WHICH IS STILL CAPABLE OF FURTHER APPRECIABLE COMPRESSION, APPLYING A UNIFORM LAYER OF FREEFLOWING DRY GRANULAR MATERIAL HAVING BONDING CHARACTERISTICS OVER THE CORE TABLET IN A DIE, AND APPLYING TO THE GRANULAR COATING MATERIAL SUCH A COMPRESSIVE FORCE AS TO COMPRESS THE COATING ON THE CORE TABLET AND DIMINISH THE THICKNESS OF THE CORE TABLET AT LEAST 8%, WHEREBY THE PARTICLES OF GRANULAR MATERIAL ARE INTERMINGLED AT THE INTERFACE RESULTING IN A FIRM BONDING OF THE COATING TO THE CORE TABLET.
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) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |