Patent FR2533628A2 successfully refreshed from Google Patents.
US3984571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocolloid containing liquid carrier for a diagnostic or therapeutic agent
Assignee: ER Squibb and Sons LLC
•
Filing: 1974-08-08
•
Granted: 1976-10-05
•
Expires: 1994-08-08
Abstract
Abstract On contacting a moist aqueous surface, a fine particle size hydrocolloid suspended in a non-aqueous water-immiscible mobile liquid attaches itself through rapid hydration to the moist surface. Drainage of the mobile liquid leaves a coating of the particles of the hydrocolloid on the surface. If a radiopaque agent or a medicinal agent is co-suspended with the hydrocolloid, a uniform thin layer of the agent will be carried by the particles of hydrated hydrocolloid onto the moist surface.
Inventors
- 👤 James Ling Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/10; A23F5/14; A23F5/145; A23L; A23L25/00; A23L25/20; A23L25/25; A61; A61K; A61K47/00; A61K47/30; A61K47/36; A61K47/38; A61K49/00; A61K49/04; A61K49/0409; A61K49/0433; A61K49/0447; A61K49/0461; A61K9/00; A61K9/0012; A61K9/0053; A61K9/006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A liquid carrier for a therapeutic or diagnostic agent consisting essentially of from about 5% to about 30% by weight of a water-soluble or water-swellable hydrophilic colloid, from about 0.1% to about 10% by weight of a non-ionic wetting agent, the balance of the composition being mainly a non-aqueous water-immiscible mobile liquid, the liquid being mineral oil or a fatty acid ester of a polyhydric alcohol wherein the fatty acid has from about 12 to about 20 carbon atoms, the hydrophilic colloid being suspended in the mobile liquid.
Claim 2
Dependent Claim
88 words
A liquid carrier for a therapeutic or diagnostic agent consisting essentially of from about 5% to about 30% by weight of a water-soluble or water-swellable hydrophilic colloid, from about 0.1% to about 10% by weight of a non-ionic wetting agent, the balance of the composition being mainly a non-aqueous water-immiscible mobile liquid, the liquid being mineral oil or a fatty acid ester of a polyhydric alcohol wherein the fatty acid has from about 12 to about 20 carbon atoms, the hydrophilic colloid being suspended in the mobile liquid.
Claim 3
Dependent Claim
16 words
A carrier according to claim 1 wherein the non-ionic wetting agent is polyoxyethylene (20) sorbitan tristearate.
Claim 4
Dependent Claim
20 words
A carrier according to claim 2 wherein the hydrophilic colloid is methyl cellulose and the mobile liquid is mineral oil.
Claim 5
Dependent Claim
13 words
A carrier according to claim 1 wherein the mobile liquid is mineral oil.
Claim 6
Dependent Claim
55 words
A carrier according to claim 1 wherein the hydrophilic colloid is a cellulose ether, a cellulose alkyl hydroxylate, a cellulose alkyl carboxylate, an alkali metal salt of a cellulose alkyl carboxylate, gum acacia, guar gum, gum tragacanth, gum xanthan, an alkali metal or alkaline earth metal carageenate, ammonium or sodium alginate, or a mixture thereof.
Claim 7
Dependent Claim
32 words
A carrier according to claim 3 which contains about 9.6% by weight of methyl cellulose, about 86.5% by weight of mineral oil and about 3.8% by weight of said non-ionic wetting agent.
References Cited (Backward Citations)
DE606519C
Cited
US2914443A
Cited
US3218349A
Cited
US3004964A
Cited
US3360436A
Cited
SE302175B
Cited
US3192118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |