US2787579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped activated carbon medicinal coated with carboxyalkyl ether
Assignee: ALGEMEENE NORIT MIJ NV
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Filing: 1953-06-15
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Granted: 1957-04-02
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Expires: 1973-06-15
Abstract
No abstract record available.
Inventors
- 👤 Weel Thonis Johannes Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:11
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/44; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/286; A61K9/2866
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A MEDICINAL PREPARATION COMPRISING A SHAPED PRODUCT CONSISTING ESSENTIALLY OF ACTIVATED CARBON, SAID SHAPED PRODUCT BEING COATED WITH A THIN HYDROPHILIC FILM TO SUBSTANTIALLY ELIMINATE ITS TENDENCY TO GIVE OFF CARBON PARTICLES UPON CONTACT WITH OTHER SURFACES, SAID FILM CONSISTING OF WATER-SOLUBLE CARBOXYALKYL ETHER OF CELLULOSE AND BEING OF A THICKNESS OF LES THN 0.01 MM., THE AMOUNT OF SAID CARBOXYALKYL ETHER OF CELLULOSE BEING SUCH THAT THE ADSORPTIVE PROPERTIES OF SAID CARBON ARE NOT MATERIALLY DECREASED.
Claim 2
Dependent Claim
77 words
A MEDICINAL PREPARATION COMPRISING A SHAPED PRODUCT CONSISTING ESSENTIALLY OF ACTIVATED CARBON, SAID SHAPED PRODUCT BEING COATED WITH A THIN HYDROPHILIC FILM TO SUBSTANTIALLY ELIMINATE ITS TENDENCY TO GIVE OFF CARBON PARTICLES UPON CONTACT WITH OTHER SURFACES, SAID FILM CONSISTING OF WATER-SOLUBLE CARBOXYALKYL ETHER OF CELLULOSE AND BEING OF A THICKNESS OF LES THN 0.01 MM., THE AMOUNT OF SAID CARBOXYALKYL ETHER OF CELLULOSE BEING SUCH THAT THE ADSORPTIVE PROPERTIES OF SAID CARBON ARE NOT MATERIALLY DECREASED.
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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |