Patent US4063016A successfully refreshed from Google Patents.
US4063016A
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Chitin complexes with alcohols and carbonyl compounds
Assignee: University of Delaware
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Filing: 1975-12-15
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Granted: 1977-12-13
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Expires: 1995-12-15
Abstract
Abstract New compositions of matter comprising complexes of chitin with lower molecular weight alcohols, aldehydes and ketones have been discovered. These complexes are useful in the solution and purification of chitin and in the preparation of modified chitins for fibers, films and plastics, and for pharmaceutical purposes.
Inventors
- 👤 Paul R. Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:24
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; C08B37/0027; C08B37/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
A complex of chitin with an oxygen-containing complexing agent containing up to 10 carbon atoms selected from the group consisting of saturated aliphatic and alicyclic alcohols, aldehydes, and ketones, said complex having a sharp endothermic heat change when subjected to differential thermal analysis.
Claim 2
Dependent Claim
43 words
A complex of chitin with an oxygen-containing complexing agent containing up to 10 carbon atoms selected from the group consisting of saturated aliphatic and alicyclic alcohols, aldehydes, and ketones, said complex having a sharp endothermic heat change when subjected to differential thermal analysis.
Claim 3
Dependent Claim
16 words
A complex of claim 1 wherein the oxygen-containing complexing agent contains up to 5 carbon atoms.
Claim 4
Dependent Claim
24 words
The complex of claim 1 wherein the mole ratio of N-acetylglucosamine unit of chitin to the oxygen-containing complexing atent ranges from 1:6 to 5:1.
Claim 5
Dependent Claim
12 words
The complex of claim 3 wherein the oxgen-containing complexing agent is methanol.
Claim 6
Dependent Claim
12 words
The complex of claim 3 wherein the oxygen-containing complexing agent is acetone.
Claim 7
Dependent Claim
12 words
The complex of claim 3 wherein the oxygen-containing complexing agent is chloral.
Claim 8
Dependent Claim
12 words
The complex of claim 1 wherein the oxygen-containing complexing agent is camphor.
References Cited (Backward Citations)
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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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |