Patent US2949402A successfully refreshed from Google Patents.
US2949402A
Expired / Lapsed
US
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Tablet coating
Assignee: Wyeth Holdings LLC
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Filing: 1958-04-16
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Granted: 1960-08-16
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Expires: 1978-04-16
Abstract
No abstract record available.
Inventors
- 👤 Mehrabi-Nejad Shahriar
- 👤 Grunigen Alfred Charles De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:09
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/2853; A61K9/286; A61K9/2866
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD OF COATING PHARMACEUTICAL TABLETS WHICH COMPRISES THE STEPS OF APPLYING TO SAID TABLETS, WHILE THEY ARE TUNBLING IN A TABLET COATING PAN, A SOLUTION CONTAINING A CELLULOSE ESTER OF A DICARBOXYLIC ACID AS A FILM-FORMING SUBSTANCE AND FOR EACH HUNDRED PARTS THEREOF FROM 100 TO 400 PARTS BY WEIGHT OF A POLYALKYLENE GLYCOL AND FROM 25 TO 50 PARTS BY WEIGHT OF HYDROXYPROPYLGLYCEROL.
Claim 2
Independent Claim
65 words
A METHOD OF COATING PHARMACEUTICAL TABLETS WHICH COMPRISES THE STEPS OF APPLYING TO SAID TABLETS, WHILE THEY ARE TUNBLING IN A TABLET COATING PAN, A SOLUTION CONTAINING A CELLULOSE ESTER OF A DICARBOXYLIC ACID AS A FILM-FORMING SUBSTANCE AND FOR EACH HUNDRED PARTS THEREOF FROM 100 TO 400 PARTS BY WEIGHT OF A POLYALKYLENE GLYCOL AND FROM 25 TO 50 PARTS BY WEIGHT OF HYDROXYPROPYLGLYCEROL.
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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |