Patent US3256111A successfully refreshed from Google Patents.
US3256111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating tablets
Assignee: Abbott Laboratories
•
Filing: 1964-12-04
•
Granted: 1966-06-14
•
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 11:58
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)
US2648609A
Cited
US2816062A
Cited
US2887440A
Cited
US3043747A
Cited
US2986475A
Cited
US3112220A
Cited
US3015609A
Cited
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 |