Patent US2853420A successfully refreshed from Google Patents.
US2853420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethyl cellulose coatings for shaped medicinal preparations
Assignee: Individual
•
Filing: 1956-07-19
•
Granted: 1958-09-23
•
Expires: 1976-07-19
Abstract
No abstract record available.
Inventors
- 👤 Lowey Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:14
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2072; A61K9/2077; A61K9/2081; A61J; A61J3/00; A61J3/005; A61K9/48; A61K9/50; A61K9/5073; A61K9/5078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A MEDICALLY ACTIVE SHAPED PREPARATION, A NUMBER OF SUBSTANTIALLY ROUND MEDICALLY INACTIVE GRANULATED CARRIERS, EACH HAVING AN IMPREGNATION OF A SOLUTION OF THERAPEUTICALLY ACTIVE MATERIAL IN ETHYLCELLULOSE AND UPON SAID IMPREGNATION A NUMBER OF ACTION-DELAYING ETHYLCELLULOSE COATINGS, THE NUMBER OF CAOTINGS ON AT LEAST SOME OF SAID CARRIRS BEING DIFFERENT FROM THE NUMBER ON THE REMAINING CARRIERS BY AT LEAST 25; AND 25 COATING CONTAINING A TOTAL AMOUNT OF COATING MATERIAL OF THE ORDER OF 1% OF THE WEIGHT OF THE INACTIVE CARRIER SUBSTANTIALLY EQUALLY DIVIDED AMONG SAID 25 COATINGS, AND EACH OF SAID COATINGS BEING SUBSTANTIALLY NOT THICKER THAN 1% OF ITS RADIUS.
Claim 2
Dependent Claim
105 words
IN A MEDICALLY ACTIVE SHAPED PREPARATION, A NUMBER OF SUBSTANTIALLY ROUND MEDICALLY INACTIVE GRANULATED CARRIERS, EACH HAVING AN IMPREGNATION OF A SOLUTION OF THERAPEUTICALLY ACTIVE MATERIAL IN ETHYLCELLULOSE AND UPON SAID IMPREGNATION A NUMBER OF ACTION-DELAYING ETHYLCELLULOSE COATINGS, THE NUMBER OF CAOTINGS ON AT LEAST SOME OF SAID CARRIRS BEING DIFFERENT FROM THE NUMBER ON THE REMAINING CARRIERS BY AT LEAST 25; AND 25 COATING CONTAINING A TOTAL AMOUNT OF COATING MATERIAL OF THE ORDER OF 1% OF THE WEIGHT OF THE INACTIVE CARRIER SUBSTANTIALLY EQUALLY DIVIDED AMONG SAID 25 COATINGS, AND EACH OF SAID COATINGS BEING SUBSTANTIALLY NOT THICKER THAN 1% OF ITS RADIUS.
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |