Patent US5544660A successfully refreshed from Google Patents.
US3256111A
Expired / Lapsed
US
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Method for coating tablets
Assignee: Abbott Laboratories
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Filing: 1964-12-04
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Granted: 1966-06-14
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Expires: 1984-12-04
Abstract
No abstract record available.
Inventors
- 👤 Robert E Singiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:44
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/286; A61K9/2866; A61J; A61J3/00; A61J3/005; A61K9/282; A61K9/2886; A61K9/2893
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE METHOD OF APPLYING A PROTECTIVE GLOSSY COATING TO PREVIOUSLY COATED AND DRIED TABLETS COMPRISING THE STEPS OF FORMULATING A FLUID COATING COMPOSITION CONSISTING ESSENTIALLY OF HYDROXYPROPYLMETHYLCELLULOSE CONTAINING 5-15% BY WEIGHT O 2-HYDROXYPROPOXYL GROUPS AND 27-32% BY WEIGHT OF METHOXYL GROUPS AS THE SOLE FILM-FORMING COMPONENT, AND A NONAQUEOUS SOLVENT FOR SAID HYDROXYPROPYLMETHYLCELLULOSE, SAID SOLVENT HAVING A BOILING POINT BELOW ABOUT 80*C., DIRECTING A STREAM OF AIR OF A TEMPERATURE BETWEEN 30 AND 80*C. UPWARDLY THROUGH A BED OF SAID COATED TABLETS TO CAUSE FLUIDIZATION OF SAID TABLETS, AND INTRODUCING SAID FLUID COATING COMPOSITION INTO SAID STREAM OF WARM AIR FOR A PERIOD OF AT LEAST 10 MINUTES TO FORM A PROTECTIVE COATING.
Claim 2
Independent Claim
113 words
THE METHOD OF APPLYING A PROTECTIVE GLOSSY COATING TO PREVIOUSLY COATED AND DRIED TABLETS COMPRISING THE STEPS OF FORMULATING A FLUID COATING COMPOSITION CONSISTING ESSENTIALLY OF HYDROXYPROPYLMETHYLCELLULOSE CONTAINING 5-15% BY WEIGHT O 2-HYDROXYPROPOXYL GROUPS AND 27-32% BY WEIGHT OF METHOXYL GROUPS AS THE SOLE FILM-FORMING COMPONENT, AND A NONAQUEOUS SOLVENT FOR SAID HYDROXYPROPYLMETHYLCELLULOSE, SAID SOLVENT HAVING A BOILING POINT BELOW ABOUT 80*C., DIRECTING A STREAM OF AIR OF A TEMPERATURE BETWEEN 30 AND 80*C. UPWARDLY THROUGH A BED OF SAID COATED TABLETS TO CAUSE FLUIDIZATION OF SAID TABLETS, AND INTRODUCING SAID FLUID COATING COMPOSITION INTO SAID STREAM OF WARM AIR FOR A PERIOD OF AT LEAST 10 MINUTES TO FORM A PROTECTIVE COATING.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |