US4159932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for activating chitin by microwave treatment and improved activated chitin product
Assignee: KYPRO Inc A CORP OF
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Filing: 1978-01-03
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Granted: 1979-07-03
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Expires: 1998-01-03
Abstract
Abstract This disclosure is concerned with a process for treating chitin under certain moisturized conditions with microwave energy to increase its reactivity in general, and when in appropriate alkali, to accelerate the deacetylation thereof. Highly active chitin products or derivatives are thus produced.
Inventors
- 👤 Quintin P. Peniston
- 👤 Edwin L. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:17
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/126
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
34 words
A process for enhancement of the reactivity of chitin, that comprises, conditioning the chitin with one of water or a strong alkali mixable with the chitin, and radiating the conditioned chitin with microwave energy.
Claim 2
Dependent Claim
34 words
A process for enhancement of the reactivity of chitin, that comprises, conditioning the chitin with one of water or a strong alkali mixable with the chitin, and radiating the conditioned chitin with microwave energy.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 and in which the chitin, prior to its conditioning is particularized.
Claim 4
Dependent Claim
46 words
A process as claimed in claim 2 for increasing the solubility of the chitin and in which the particularized chitin following said microwave radiating is subsequently dried at a temperature below about 50° C. and is then subjected to the dissolving action of a suitable solvent.
Claim 5
Dependent Claim
34 words
A process as claimed in claim 1 and in which the strong alkali is an aqueous solution of sodium hydroxide for deacetylation of the chitin containing from 35 to 50% sodium hydroxide by weight.
Claim 6
Dependent Claim
25 words
A process as claimed in claim 4 and in which the time of microwave radiation treatment is adjusted from about 5 to about 60 minutes.
Claim 7
Dependent Claim
15 words
An activated chitin product or derivative prepared in accordance with the process of claim 1.
Claim 8
Dependent Claim
11 words
An activated chitin derivative as claimed in claim 6 comprising chitosan.
References Cited (Backward Citations)
US4018678A
Cited
US4000032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |