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US3862226A Expired / Lapsed US ⏱️ 0.0 years remaining

Bis-{8 beta-(4-N,N-diacetylaminophenoxy)ethyl{9 ether

Assignee: SmithKline Beecham Corp
•
Filing: 1972-02-28
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Granted: 1975-01-21
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Expires: 1992-02-28
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Abstract

Abstract Pharmaceutical formulations and their preparation, suitable for use in the treatment of liver fluke infections of mammals, of a compound of formula (I) WHEREIN X and X1 are the same or different and each is hydrogen or an alkyl group having one to three carbon atoms. Also provided are novel compounds within formula (I) and processes for their preparations. wherein R and R1 are the same or different and each is hydrogen, an optionally substituted saturated aliphatic hydrocabron group having one to seven carbon atoms, an unsaturated aliphatic hydrocarbon group having two to four carbon atoms, or together with R5 form an alkylene group having two to four carbon atoms; R2 and R3 are the same or different and each is hydrogen, a lower alkyl group having one to four carbon atoms or R5CO wherein R5 is hydrogen, an optionally substituted saturated aliphatic hydrocarbon group having one to seven carbon atoms, an unsaturated aliphatic hydrocarbon group having two to four carbon atoms, or taken together with R and/or R1 forms an alkylene group having two to four carbon atoms; and A is -CH2-, -(CH2)2-,-CH2-OCH2-or the group

Inventors

  • 👤 Morton Harfenist

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 16:29
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/16; A61K31/165; C; C07; C07C; C07C233/00; C07C233/01; C07C233/16

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 2 words
BIS-(B(4-N,N-DIACETYLAMINOPHENOXYL) ETHER.
Claim 2
Dependent Claim 2 words
BIS-(B(4-N,N-DIACETYLAMINOPHENOXYL) ETHER.

References Cited (Backward Citations)

GB749907A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-01-20 1978-07-22 1979-01-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-01-20 1982-07-22 1983-01-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-01-20 1986-07-22 1987-01-21 $7700.00 Window Closed / Lapsed

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