US2919230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic base therapeutic compositions comprising cation-exchange resin
Assignee: Rohm and Haas Co
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Filing: 1953-10-29
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Granted: 1959-12-29
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Expires: 1973-10-29
Abstract
No abstract record available.
Inventors
- 👤 Francis M Thurmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/10; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; A61K47/585; A61K9/06; A61K2800/00; A61K2800/40; A61K2800/54
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
AS A NEW COMPOSITION OF MATTER, A THERAPEUTIC PREPARATION FOR EXTERNAL APPLICATION WHICH COMPRISES A HYDROPHILIC THERAPEUTICALLY AND DERMATOLOGICALLY ACCEPTABLE OINTMENT HAVING DISPERSED THERETHROUGH FINELY DIVIDED PARTICLES OF A PURIFIED CARBOXYLIC CATION EXCHANGE RESIN GIVING A PH BETWEEN ABOUT 3 AND ABOUT 5.5 AND CARRYING A DRUG, THE SAID PARTICLES BEING LESS THAN 100 MESH IN SIZE AND THE RESIN CONSITUTING 2% TO 35% BY WEIGHT OF THE PREPARATION.
References Cited (Backward Citations)
US2501927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |