US4780317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release antimicrobial agents and method of fouling control using the same
Assignee: Kurita Water Industries Ltd
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Filing: 1987-01-22
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Granted: 1988-10-25
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Expires: 2007-01-22
Abstract
Abstract A sustained release antimicrobial agent comprises a clathrate compound composed of a water-soluble microbicide and at least one of the compounds shown at (I) to (V) below: (I) 1,1'-bi-2-naphthol; (II) 1,1,4,4-tetraphenyl-2-butyn-1,4-diol; (III) 9,10-di(4-methylphenyl)-9,10-dihydroznthracene-9,10-diol; (IV) 1,1-bis(4-hydroxyphenyl)-cyclohexane; and (V) 1,1,6,6-tetra(2,4-dimethylphenyl)-2,4-hexadiyne-1,6-diol. A method which uses it for preventing the fouling of a water system is also disclosed.
Inventors
- 👤 Ayako Sekikawa
- 👤 Hideo Sugi
- 👤 Kenji Tahara
- 👤 Fumio Toda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:03
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; A; A01; A01N; A01N25/00; A01N25/12; A01N43/00; A01N43/72; A01N43/80; A01N59/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
33 words
A sustained release antimicrobial agent comprising a clathrate compound of a water-soluble microbicide and at least one compound selected from the group consisting of the compounds shown at (I) to (V) below: ##STR8##
Claim 2
Dependent Claim
33 words
A sustained release antimicrobial agent comprising a clathrate compound of a water-soluble microbicide and at least one compound selected from the group consisting of the compounds shown at (I) to (V) below: ##STR8##
Claim 3
Dependent Claim
17 words
A sustained release antimicrobial agent as set forth in claim 1, wherein said water-soluble microbicide is 5-chloro-2-methyl-4-isothiazolin-3-one.
Claim 4
Dependent Claim
17 words
A sustained release antimicrobial agent as set forth in claim 1, wherein said water-soluble microbicide is hydrazine.
Claim 5
Dependent Claim
26 words
A sustained release antimicrobial agent as set forth in claim 1, wherein said clathrate compound is contained in the amount of 1 to 100% by weight.
Claim 6
Dependent Claim
26 words
A sustained release antimicrobial agent as set forth in claim 1, wherein said clathrate compound is contained in the amount of 5 to 50% by weight.
Claim 7
Dependent Claim
21 words
A sustained release antimicrobial agent as set forth in claim 1, wherein said clathrate compound is in the form of tablets.
Claim 8
Independent Claim
42 words
A method of preventing the fouling of a water system which comprises treatment with a clathrate compound composed of a water-soluble microbicide and at least one compound selected from the group consisting of the compounds shown at (I) to (V) below: ##STR9##
Claim 9
Independent Claim
42 words
A method of preventing the fouling of a water system which comprises treatment with a clathrate compound composed of a water-soluble microbicide and at least one compound selected from the group consisting of the compounds shown at (I) to (V) below: ##STR9##
Claim 10
Dependent Claim
31 words
A method as set forth in claim 7, wherein said treatment is carried out by allowing water in said water system to flow through a column packed with said clathrate compound.
Claim 11
Dependent Claim
44 words
A method as set forth in claim 7, wherein said treatment is carried out by submerging or floating in said water system a container holding said clathrate compound, said container being formed from a material which is permeable to water, but not soluble therein.
Claim 12
Dependent Claim
31 words
A method as set forth in claim 7, wherein said treatment is carried out by dispersing said clathrate compound in said water system, said clathrate compound being powdery o appropriately shaped.
Claim 13
Dependent Claim
39 words
A method as set forth in claim 7, wherein said treatment is carried out by causing said clathrate compound to adhere to the surface of any equipment in said water system, said clathrate compound being powdery or appropriately shaped.
Claim 14
Dependent Claim
35 words
A method as set forth in claim 7, wherein said treatment is carried out by coating the surface of any equipment in said water system with a mixture of said clathrate compound and a resin.
Claim 15
Dependent Claim
25 words
A sustained release antimicrobial agent as set forth in claim 1, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR10##
Claim 16
Dependent Claim
25 words
A sustained release antimicrobial agent as set forth in claim 1, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR11##
Claim 17
Dependent Claim
25 words
A sustained release antimicrobial agent as set forth in claim 1, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR12##
Claim 18
Dependent Claim
25 words
A sustained release antimicrobial agent as set forth in claim 1, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR13##
Claim 19
Dependent Claim
25 words
A sustained release antimicrobial agent as set forth in claim 1, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR14##
Claim 20
Dependent Claim
22 words
A method as set forth in claim 7, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR15##
Claim 21
Dependent Claim
22 words
A method as set forth in claim 7, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR16##
Claim 22
Dependent Claim
22 words
A method as set forth in claim 7, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR17##
Claim 23
Dependent Claim
22 words
A method as set forth in claim 7, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR18##
Claim 24
Dependent Claim
22 words
A method as set forth in claim 7, wherein the compound for forming a clathrate compound together with water-soluble microbicide is: ##STR19##
References Cited (Backward Citations)
US2514868A
Cited
US4243403A
Cited
US3801575A
Cited
US3928198A
Cited
US4465795A
Cited
US4539071A
Cited
US4552591A
Cited
US4644021A
Cited
US4661528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |