US4301067A
Expired / Lapsed
US
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Chitin containing poly-ion complex
Assignee: Kureha Corp
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Filing: 1980-05-28
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Granted: 1981-11-17
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Expires: 2000-05-28
Abstract
Abstract This invention relates to a poly-ion complex comprising chitin or N-acylchitosan derivative having carboxymethyl and polyelectrolyte.
Inventors
- 👤 Junichi Koshugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; C08B37/0027; C08B37/003; B; B01; B01D; B01D71/00; B01D71/06; B01D71/08; C08L; C08L5/00; C08L5/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
30 words
A poly-ion complex, comprising: chitin or N-acylchitosan derivative having carboxymethyl; and a polyelectrolyte, the acyl group of said N-acylchitosan derivative having an alkyl group of 1 to 12 carbon atoms.
Claim 2
Dependent Claim
30 words
A poly-ion complex, comprising: chitin or N-acylchitosan derivative having carboxymethyl; and a polyelectrolyte, the acyl group of said N-acylchitosan derivative having an alkyl group of 1 to 12 carbon atoms.
Claim 3
Dependent Claim
59 words
The poly-ion complex according to claim 1, wherein the N-acylchitosan derivative is selected from the group consisting of (a) carboxymethyl N-acylchitosan having the carboxymethylation degree of 0.3 to 1 per pyranose unit, and (b) de-N-acylated carboxymethyl N-acylchitosan having the carboxymethylation degree of 0.1 to 1 per pyranose unit and the de-N-acetylation degree of 0.1 to 1 per pyranose unit.
Claim 4
Dependent Claim
57 words
The poly-ion complex according to claim 1, wherein the chitin derivative is selected from the group consisting of (a) carboxymethylchitin having the carboxymethylation degree of 0.3 to 1 per pyranose unit, and (b) deacetylated carboxymethylchitin having the carboxymethylation degree of 0.1 to 1 per pyranose unit and the deacetylation degree of 0.1 to 1 per pyranose unit.
Claim 5
Dependent Claim
30 words
The poly-ion complex according to claim 1, wherein the polyelectrolyte is an aqueous solution-soluble chitosan derivative having cationic group selected from the group consisting of chitosan, glycol-chitosan, glycelide-chitosan and N-methylglycol-chitosan.
Claim 6
Dependent Claim
37 words
The poly-ion complex according to claim 1, wherein the polyelectrolyte is an aqueous solution-soluble sulfated compound selected from the group consisting of O-sulfated chitin, N-sulfated chitosan, N-sulfated glycol-chitosan, O- and N-sulfated chitosan, and O- and N-sulfated glycol-chitosan.
Claim 7
Dependent Claim
26 words
The poly-ion complex according to claim 1, wherein the polyelectrolyte is a sulfate compound selected from the group consisting of dextran sulfate, chondrotin sulfate and heparin.
Claim 8
Dependent Claim
39 words
The poly-ion complex according to claim 1, wherein the polyelectrolyte is an aqueous solution-soluble synthetic compound selected from the group consisting of polystyrenesulfonate, polyethylenesulfonate, partially sulfated polyvinyl alcohol, polyacrylate, polymethacrylate, poly-L-glutamate, poly-L-lysine, polyethyleneimine, polyvinylpyridine, polyvinylbenzyltrimethylammonium salt and polydiallyldimethylammonium salt.
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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |