Patent US2693437A successfully refreshed from Google Patents.
US2693437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating material for tablets and coated tablets
Assignee: Pharmacia and Upjohn Co
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Filing: 1951-02-27
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Granted: 1954-11-02
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Expires: 1971-02-27
Abstract
No abstract record available.
Inventors
- 👤 Arch B Spradling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/286; A61K9/2866; A61K9/282; A61K9/2826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A MEDICINAL TABLET HAVING A COATING THEREON COMPRISING INTERMIXED SUGAR AND SODIUM CARBOXYMETHYLCELLULOSE AND TITANIUM DIOXIDE IN THE PROPORTIONS OF 200 PARTS OF SUGAR TO 2 TO 7 PARTS OF SODIUM CARBOXYMETHYLCELLULOSE TO 0.5 TO 3 PARTS OF TITANIUM DIOXIDE AND CHARACTERIZED BY ELASTICITY AND RESISTANCE TO FRACTURE.
Claim 2
Dependent Claim
48 words
A MEDICINAL TABLET HAVING A COATING THEREON COMPRISING INTERMIXED SUGAR AND SODIUM CARBOXYMETHYLCELLULOSE AND TITANIUM DIOXIDE IN THE PROPORTIONS OF 200 PARTS OF SUGAR TO 2 TO 7 PARTS OF SODIUM CARBOXYMETHYLCELLULOSE TO 0.5 TO 3 PARTS OF TITANIUM DIOXIDE AND CHARACTERIZED BY ELASTICITY AND RESISTANCE TO FRACTURE.
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) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |