US3868447A
Expired / Lapsed
US
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Hema paste
Assignee: National Patent Development Corp
•
Filing: 1972-02-02
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Granted: 1975-02-25
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Expires: 1992-02-02
Abstract
Abstract A paste is made of an organic solvent soluble hydrophilic copolymer of a hydroxy lower alkyl acrylate or methacrylate and 0.01 to 50%, preferably 0.05 to 1%, of the diester of a glycol and acrylic acid or methacrylic, an active inorganic filler, e.g. silica and an organic solvent for the copolymer.
Inventors
- 👤 Karel Kliment
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:43
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/20; A; A61; A61K; A61K47/00; A61K47/30; A61K47/32; A61K6/00; A61K6/60; A61K6/65; A61K6/66; A61K6/69; A61K6/70; A61K6/71; A61K6/76; C08F220/00; C08F220/02; C08F220/10; C08F220/26; C08F220/28; C08F220/282; C08K; C08K3/00; C08K3/34; C08K3/36
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
24 words
A PASTE CONSISTING ESSENTIALLY OF (1) 0.2 TO 6.5% OF A NON CROSS-LINKED, ORGANIC SOLVENT SOLUBLE, HYDROPHILIC COPOLYMER OF A CONOESTER HAVING THE FORMULA:
Claim 2
Dependent Claim
24 words
A PASTE CONSISTING ESSENTIALLY OF (1) 0.2 TO 6.5% OF A NON CROSS-LINKED, ORGANIC SOLVENT SOLUBLE, HYDROPHILIC COPOLYMER OF A CONOESTER HAVING THE FORMULA:
Claim 3
Dependent Claim
15 words
A paste according to claim 1 wherein the filler is silica, alumina or diatomaceous earth.
Claim 4
Dependent Claim
20 words
A paste according to claim 2 wherein the diester is present in an amount up to 1% in the copolymer.
Claim 5
Dependent Claim
10 words
A paste according to claim 3 wherein R is methyl.
Claim 6
Dependent Claim
14 words
A paste according to claim 4 wherein n is 2 and x is zero.
Claim 7
Dependent Claim
14 words
A paste according to claim 5 wherein the solvent is a water soluble solvent.
Claim 8
Dependent Claim
22 words
A paste according to claim 6 wherein the solvent includes glycerol in an amount up to 60% of the total paste mixture.
Claim 9
Dependent Claim
36 words
A paste according to claim 6 wherein the solvent is glycerol diacetate, butanol, pentanol, propylene glycol, dipropylene glycol, methoxyethanol, ethoxyethanol, ethylene carbonate, 1,2-propanediol carbonate with 0 to 60% of glycerol based on the total paste mixture.
Claim 10
Dependent Claim
13 words
A paste according to claim 5 wherein the filler is finely divided silica.
Claim 11
Dependent Claim
14 words
A paste according to claim 2 wherein the solvent is a water soluble solvent.
Claim 12
Dependent Claim
16 words
A paste according to claim 10 whrrein the solvent contains at least one alcoholic hydroxyl group.
Claim 13
Dependent Claim
25 words
A paste according to claim 2 wherein the solvent comprises glycerol diacetate, propylene glycol, methoxyethanol, ethoxyethanol, 1,2-propanediol carbonate, ethylene carbonate, butanol, pentanol or dipropylene glycol.
Claim 14
Dependent Claim
16 words
A paste according to claim 2 wherein the biologically active drug substance is a local anesthetic.
Claim 15
Dependent Claim
11 words
A paste according to claim 13 further including a flavoring agent.
Claim 16
Dependent Claim
18 words
A paste according to claim 2 wherein the filler has a particle size of 0.1 to 100 microns.
Claim 17
Dependent Claim
20 words
A paste according to claim 15 wherein the diester is present in an amount up to 1% in the copolymer.
Claim 18
Dependent Claim
12 words
A paste according to claim 1 wherein the filler is activated carbon.
Claim 19
Dependent Claim
20 words
A paste according to claim 17 wherein the diester is present in an amount up to 1% in the copolymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |