US4365061A
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Inclusion complexes of cyclodextrins and strong inorganic oxy-acids and process for their preparation
Assignee: Chinoin Private Co Ltd
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Filing: 1981-10-16
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Granted: 1982-12-21
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Expires: 2001-10-16
Abstract
Abstract Inclusion complexes of cyclodextrin and strong inorganic oxy acids are disclosed as well as a process for the preparation of the complexes. The complexes are useful for analytical purposes, internal buffering, introducing acids into anhydrous media, substitutions or introduction of radicals, or as catalysts.
Inventors
- 👤 Jozsef Szejtli
- 👤 Zsuzsanna Budai
- 👤 Gabriella Pap nee Imrenyi
- 👤 Andras Kerekes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:29
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0007; A62D1/0014; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0012; C08B37/0015
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
11 words
An inclusion complex of a cyclodextrin and a strong inorganic oxy-acid.
Claim 2
Dependent Claim
11 words
An inclusion complex of a cyclodextrin and a strong inorganic oxy-acid.
Claim 3
Dependent Claim
12 words
The inclusion complex defined in claim 1 of β-cyclodextrin and phosphoric acid.
Claim 4
Dependent Claim
12 words
The inclusion complex defined in claim 1 of γ-cyclodextrin and phosphoric acid.
Claim 5
Dependent Claim
12 words
The inclusion complex defined in claim 1 of α-cyclodextrin and phosphoric acid.
Claim 6
Dependent Claim
12 words
The inclusion complex defined in claim 1 of β-cyclodextrin and sulfuric acid.
Claim 7
Dependent Claim
12 words
The inclusion complex defined in claim 1 of γ-cyclodextrin and sulfuric acid.
Claim 8
Dependent Claim
12 words
The inclusion complex defined in claim 1 of α-cyclodextrin and sulfuric acid.
Claim 9
Dependent Claim
12 words
The inclusion complex defined in claim 1 of β-cyclodextrin and nitric acid.
Claim 10
Dependent Claim
12 words
The inclusion complex defined in claim 1 of α-cyclodextrin and nitric acid.
Claim 11
Dependent Claim
99 words
A process for the preparation of an inclusion complex of a cyclodextrin and a strong inorganic oxy-acid which comprises reacting a solid α-, β- or γ-cyclodextrin or a mixture of one of said cyclodextrins and a linear dextrin containing at least 60% by weight cyclodextrin while stirring with 0.25 to 4 ml (for each gram of cyclodextrin) of a 30 to 85% by weight aqueous phosphoric acid solution or a 30 to 75% by weight aqueous sulfuric acid solution or a 20 to 65% by weight aqueous nitric acid solution of a temperature between -5° C. and +25° C.
Claim 12
Dependent Claim
99 words
A process for the preparation of an inclusion complex of a cyclodextrin and a strong inorganic oxy-acid which comprises reacting a solid α-, β- or γ-cyclodextrin or a mixture of one of said cyclodextrins and a linear dextrin containing at least 60% by weight cyclodextrin while stirring with 0.25 to 4 ml (for each gram of cyclodextrin) of a 30 to 85% by weight aqueous phosphoric acid solution or a 30 to 75% by weight aqueous sulfuric acid solution or a 20 to 65% by weight aqueous nitric acid solution of a temperature between -5° C. and +25° C.
Claim 13
Dependent Claim
12 words
Process according to claim 10 wherein the cyclodextrin used is the α-cyclodextrin.
Claim 14
Dependent Claim
12 words
Process according to claim 10 wherein the cyclodextrin used is the β-cyclodextrin.
Claim 15
Dependent Claim
12 words
Process according to claim 10 wherein the cyclodextrin used is the γ-cyclodextrin.
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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |