Patent US2523316A successfully refreshed from Google Patents.
US2523316A
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US
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Ointment containing bentonite
Assignee: CHESEBROUGH Manufacturing Co
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Filing: 1944-11-15
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Granted: 1950-09-26
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Expires: 1964-11-15
Abstract
No abstract record available.
Inventors
- 👤 William S Mcclenahan
- 👤 Harry A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:14
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/06; A61K47/02; A61K8/00; A61K8/02; A61K8/0212; A61K8/18; A61K8/19; A61K8/26; A61K8/30; A61K8/31; A61K9/00; A61K9/0012; A61K9/0014; A61Q; A61Q19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A WATER REMOVABLE AND STABLE PLASTIC OINTMENT BASE CONSISTING SUBSTANTIALLY OF AN EMULSION OF A BENTONITE GEL AND A HYDROPHOBIC GREASE, WITH THE BENTONITE GEL PROVIDING THE CONTINUOUS PHASE AND BEING AN AQUEOUS GEL OF A BENTONITE HAVING A SWELLING POWER IN EXCESS OF SUBSTANTIALLY 11 ML. UPON U.S.P. XII TEST; SAID BASE COMPRISING SUBSTANTIALLY 10 TO 30 PERCENT OF THE BENTONITE, 10 TO 30 PERCENT OF THE GREASE, AND THE REMAINDER WATER, AND CHARACTERIZED IN HAVING AND MAINTAINING AN A.S.T.M. CONSISTENCY (PETROLATUM TEST) OF 100 TO 275 UNITS BETWEEN ROOM TEMPERATURE AND PLUS 150 DEGREE F., IN REMAINING STABLE AND CAPABLE OF REMOVAL BY WATER AFTER UNDERGOING EXPOSURE TO TEMPERATURE OF MINUS 40 DEGREES F. TO PLUS 250 DEGREES F. AND IN HAVING NO CRITICAL TEMPERATURE BETWEEN ITS FREEZING POINT AND PLUS 250 DEGREES F.
Claim 2
Dependent Claim
136 words
A WATER REMOVABLE AND STABLE PLASTIC OINTMENT BASE CONSISTING SUBSTANTIALLY OF AN EMULSION OF A BENTONITE GEL AND A HYDROPHOBIC GREASE, WITH THE BENTONITE GEL PROVIDING THE CONTINUOUS PHASE AND BEING AN AQUEOUS GEL OF A BENTONITE HAVING A SWELLING POWER IN EXCESS OF SUBSTANTIALLY 11 ML. UPON U.S.P. XII TEST; SAID BASE COMPRISING SUBSTANTIALLY 10 TO 30 PERCENT OF THE BENTONITE, 10 TO 30 PERCENT OF THE GREASE, AND THE REMAINDER WATER, AND CHARACTERIZED IN HAVING AND MAINTAINING AN A.S.T.M. CONSISTENCY (PETROLATUM TEST) OF 100 TO 275 UNITS BETWEEN ROOM TEMPERATURE AND PLUS 150 DEGREE F., IN REMAINING STABLE AND CAPABLE OF REMOVAL BY WATER AFTER UNDERGOING EXPOSURE TO TEMPERATURE OF MINUS 40 DEGREES F. TO PLUS 250 DEGREES F. AND IN HAVING NO CRITICAL TEMPERATURE BETWEEN ITS FREEZING POINT AND PLUS 250 DEGREES F.
References Cited (Backward Citations)
US1515777A
Cited
US2409338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |