Patent US4393073A successfully refreshed from Google Patents.
US4393073A
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US
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Pharmaceutical preparations
Assignee: Hoffmann La Roche Inc
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Filing: 1982-04-26
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Granted: 1983-07-12
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Expires: 2002-04-26
Abstract
Abstract Pharmaceutical preparations containing glycerol alkyl ethers as the solvent.
Inventors
- 👤 Walter Boguth
- 👤 Georges Hirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:34
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0019; A61K31/00; A61K31/63; A61K31/635; A61K47/00; A61K47/06; A61K47/08; A61K47/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
66 words
A pharmaceutical preparation comprising an effective amount of a vitamin selected from the group consisting of vitamin A acetate, vitamin K 1 and vitamin E and a solvent containing a glycerol lower-alkyl ether selected from glycerol 1-methyl ether, glycerol 1-ethyl ether, glycerol 1,3-dimethyl ether and glycerol, 1,2-dimethyl ether, said glycerol lower-alkyl ether and said solvent being present in an amount sufficient to dissolve said active ingredient.
Claim 2
Dependent Claim
66 words
A pharmaceutical preparation comprising an effective amount of a vitamin selected from the group consisting of vitamin A acetate, vitamin K 1 and vitamin E and a solvent containing a glycerol lower-alkyl ether selected from glycerol 1-methyl ether, glycerol 1-ethyl ether, glycerol 1,3-dimethyl ether and glycerol, 1,2-dimethyl ether, said glycerol lower-alkyl ether and said solvent being present in an amount sufficient to dissolve said active ingredient.
Claim 3
Dependent Claim
22 words
The preparation of claim 1 wherein said ether is present in said solvent in an amount of at least 50% by volume.
Claim 4
Dependent Claim
18 words
The preparation of claim 2 wherein the glycerol lower-alkyl ether is a glycerol mono(lower-alkyl)ether or a glycerol di(lower-alkyl)ether.
Claim 5
Dependent Claim
21 words
The preparation of claim 3 wherein the glycerol lower-alkyl ether is glycol 1,2-dimethyl ether, glycerol 1-methyl ether or glycerol 1,3-dimethyl ether.
Claim 6
Dependent Claim
27 words
The preparation of claim 2 wherein the solvent contains 50% to 80% by volume of a glycerol lower-alkyl ether and 20% to 50% by volume of water.
Claim 7
Dependent Claim
10 words
The preparation of claim 5 wherein said solvent contains ethanol.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |