US4585482A
Expired / Lapsed
US
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Long-acting biocidal compositions and method therefor
Assignee: Southern Research Institute
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Filing: 1984-05-25
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Granted: 1986-04-29
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Expires: 2004-05-25
Abstract
Abstract There is disclosed, in one aspect, a long-acting biocidal composition. This composition comprises a chlorine dioxide-liberating compound, such as sodium chlorite, and sufficient organic acid-generating compound, such as poly(lactic acid), to lower the pH of the composition to less than about 7. The organic acid-generating compound is present in a form whereby it is released gradually in the presence of water. Preferably the organic acid-generating compound is encapsulated within or by a film-forming polymer. In another aspect, there is disclosed a method of disinfecting a surface over a prolonged period of time. This method comprises applying to the surface a small but effective amount of the long-acting biocidal composition described above.
Inventors
- 👤 Thomas R. Tice
- 👤 William E. Meyers
- 👤 Richard M. Gilley
- 👤 William M. Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:48
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/26; A01N25/28; A01N59/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
46 words
A long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being present in a form whereby it is released gradually in the presence of water.
Claim 2
Dependent Claim
46 words
A long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being present in a form whereby it is released gradually in the presence of water.
Claim 3
Dependent Claim
34 words
The composition of claim 1 wherein the organic acid which is generated in water from said organic acid-generating polymer is at least one member selected from the group consisting of lactic, maleic and glycolic.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein said organic acid is lactic acid.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein said composition additionally contains a humectant.
Claim 6
Dependent Claim
47 words
A long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being in the form of discrete microspheres or microparticles which hydrolyze in the presence of water.
Claim 7
Dependent Claim
47 words
A long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being in the form of discrete microspheres or microparticles which hydrolyze in the presence of water.
Claim 8
Dependent Claim
34 words
The composition of claim 5 wherein the organic acid which is generated in water from said organic acid-generating polymer is at least one member selected from the group consisting of lactic, maleic and glycolic.
Claim 9
Dependent Claim
12 words
The composition of claim 6 wherein said organic acid is lactic acid.
Claim 10
Dependent Claim
12 words
The composition of claim 7 wherein said composition additionally contains a humectant.
Claim 11
Dependent Claim
54 words
A long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being encapsulated by a film forming polymer which will allow sufficient water to contact said organic acid-generating compound to generate said organic acid.
Claim 12
Dependent Claim
54 words
A long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being encapsulated by a film forming polymer which will allow sufficient water to contact said organic acid-generating compound to generate said organic acid.
Claim 13
Dependent Claim
34 words
The composition of claim 9 wherein the organic acid which is generated in water from said organic acid-generating polymer is at least one member selected from the group consisting of lactic, maleic and glycolic.
Claim 14
Dependent Claim
12 words
The composition of claim 10 wherein said organic acid is lactic acid.
Claim 15
Dependent Claim
12 words
The composition of claim 11 wherein said composition additionally contains a humectant.
Claim 16
Dependent Claim
18 words
The composition of claim 8 wherein said humectant is selected from the group consisting of glycerol and sorbitol.
Claim 17
Independent Claim
70 words
A method of disinfecting a surface over a prolonged period of time comprising applying to said surface a small but biocidally effective amount of a long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being present in a form whereby it is released gradually in the presence of water.
Claim 18
Independent Claim
70 words
A method of disinfecting a surface over a prolonged period of time comprising applying to said surface a small but biocidally effective amount of a long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being present in a form whereby it is released gradually in the presence of water.
Claim 19
Independent Claim
69 words
A method of disinfecting a surface over a prolonged period of time comprising applying to said surface a small but biocidally effective amount of a long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being in the form of discrete microspheres which hydrolyze in the presence of water.
Claim 20
Independent Claim
69 words
A method of disinfecting a surface over a prolonged period of time comprising applying to said surface a small but biocidally effective amount of a long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient hydrolyzable organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being in the form of discrete microspheres which hydrolyze in the presence of water.
Claim 21
Independent Claim
77 words
A method of disinfecting a surface over a prolonged period of time comprising applying to said surface a small but biocidally effective amount of a long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being encapsulated by a film forming polymer which will allow sufficient water to contact said organic acid-generating compound to generate said organic acid.
Claim 22
Independent Claim
77 words
A method of disinfecting a surface over a prolonged period of time comprising applying to said surface a small but biocidally effective amount of a long-acting biocidal composition comprising a chlorine dioxide-liberating compound and sufficient organic acid-generating polymer to lower the pH of said composition to less than about 7, said organic acid-generating polymer being encapsulated by a film forming polymer which will allow sufficient water to contact said organic acid-generating compound to generate said organic acid.
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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |