US4201599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restoration and protection of cutting surfaces
Assignee: Individual
•
Filing: 1978-07-06
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Granted: 1980-05-06
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Expires: 1998-07-06
Abstract
Abstract A method of restoring and/or protecting a cutting surface so that it has an increased effective life comprises applying to the cutting surface a chlorhexidine compound dispersed or dissolved in a carrier therefor. Novel compositions for use for this purpose comprise solutions or suspensions of chlorhexidine compounds in suitable carriers, preferably together with cationic surfactants.
Inventors
- 👤 Trevor Morgans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:12
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/08
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
71 words
A method of protecting a metal cutting surface as ground which comprises applying to the cutting surface an amount sufficient to protect said metal cutting surface of a chlorhexidine compound dispersed or dissolved in a carrier therefor and for a predetermined time sufficient for said chlorhexidine compound to interact with said metal cutting surface to protect said metal cutting surface, whereby the effective life of the ground cutting surface is prolonged.
Claim 2
Independent Claim
71 words
A method of protecting a metal cutting surface as ground which comprises applying to the cutting surface an amount sufficient to protect said metal cutting surface of a chlorhexidine compound dispersed or dissolved in a carrier therefor and for a predetermined time sufficient for said chlorhexidine compound to interact with said metal cutting surface to protect said metal cutting surface, whereby the effective life of the ground cutting surface is prolonged.
Claim 3
Dependent Claim
26 words
A method as claimed in claim 1, wherein the chlorhexidine compound is dissolved in water and the cutting surface is immersed in the solution thereby formed.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 1, wherein the chlorhexidine compound is incorporated in a gel or cream applied to the cutting surface and allowed to stand thereon.
Claim 5
Dependent Claim
26 words
A method as claimed in claim 1, wherein the chlorhexidine compound is present in the carrier in a concentration of from 0.001 to 3% by weight.
Claim 6
Dependent Claim
15 words
A method as claimed in claim 1, wherein the chlorhexidine compound is a chlorhexidine salt.
Claim 7
Dependent Claim
14 words
A method as claimed in claim 5, wherein the chlorhexidine salt is chlorhexidine digluconate.
Claim 8
Dependent Claim
25 words
A method as claimed in claim 5, wherein an aqueous chlorhexidine digluconate solution having a concentration of from 0.5 to 1.3% by weight is employed.
Claim 9
Dependent Claim
18 words
A method as claimed in claim 1, which is applied to a cutting edge of a razor blade.
Claim 10
Dependent Claim
19 words
A method as claimed in claim 1, which is applied to a cutting edge of a paper cutting blade.
Claim 11
Independent Claim
48 words
A method of restoring a used cutting surface of a razor blade, which comprises bringing the cutting surface into contact with an amount sufficient to restore said metal cutting surface of a chlorhexidine compound dispersed or dissolved in a carrier therefor, which carrier has dispersed therein a surfactant.
Claim 12
Independent Claim
48 words
A method of restoring a used cutting surface of a razor blade, which comprises bringing the cutting surface into contact with an amount sufficient to restore said metal cutting surface of a chlorhexidine compound dispersed or dissolved in a carrier therefor, which carrier has dispersed therein a surfactant.
Claim 13
Dependent Claim
26 words
A method as claimed in claim 10, wherein the chlorhexidine compound is dissolved in water and the cutting surface is immersed in the solution thereby formed.
Claim 14
Dependent Claim
26 words
A method as claimed in claim 10, wherein the chlorhexidine compound is present in the carrier in a concentration of from 0.001 to 3% by weight.
Claim 15
Dependent Claim
47 words
A method as claimed in claim 10, wherein the chlorhexidine compound is selected from the group consisting of the dihydroiodide, dihydrochloride, dihydrofluoride, sulphate, sulphite, thiosulphate, di-acid phosphate, difluorophosphate, diformate, diisobutyrate, succinate, dimonoglycolate, monodiglycolate, dilactate, di-alpha-hydroxy isobutyrate, digluconate, diglucoheptonate, dimethanesulphonate, diisothionate, dibenzoate, dicinnamate and dimandelate salts of chlorhexidine.
Claim 16
Dependent Claim
25 words
A method as claimed in claim 13, wherein an aqueous chlorhexidine digluconate solution having a concentration of from 0.5 to 1.3% by weight is used.
Claim 17
Dependent Claim
14 words
A method as claimed in claim 10, wherein the surfactant is a cationic surfactant.
Claim 18
Dependent Claim
15 words
A method as claimed in claim 15, wherein the surfactant is a quaternary ammonium compound.
Claim 19
Dependent Claim
12 words
A method as claimed in claim 16, wherein the surfactant is cetrimide.
Claim 20
Dependent Claim
22 words
A method as claimed in claim 15, wherein the surfactant is present in a concentration of from 0.5 to 4% by weight.
Claim 21
Dependent Claim
52 words
A method as claimed in claim 10, wherein the chlorhexidine compound is dissolved in carrier which contains a rust inhibitor selected from the group consisting of sodium nitrite and sodium nitrite/sodium carbonate mixtures of equal parts by weight, which rust inhibitor is present in a concentration of up to 1% by weight.
Claim 22
Dependent Claim
19 words
A method as claimed in claim 10, wherein said predetermined period lasts for from 15 minutes to 24 hours.
Claim 23
Independent Claim
48 words
A method of restoring a used cutting surface of a paper cutting knife, which comprises bringing the cutting surface into contact with an amount sufficient to restore said cutting surface of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 24
Independent Claim
48 words
A method of restoring a used cutting surface of a paper cutting knife, which comprises bringing the cutting surface into contact with an amount sufficient to restore said cutting surface of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 25
Dependent Claim
39 words
A method as claimed in claim 21, wherein the paper cutting knife is immersed in an aqueous solution containing chlorhexidine digluconate in a concentration of from 0.01 to 3% by weight and a quaternary ammonium compound as cationic surfactant.
Claim 26
Dependent Claim
12 words
A method as claimed in claim 22, wherein the surfactant is cetrimide.
Claim 27
Dependent Claim
22 words
A method as claimed in claim 23, wherein the surfactant is present in a concentration of from 0.5 to 4% by weight.
Claim 28
Independent Claim
47 words
A method of restoring a used cutting edge of a drill bit, which comprises bringing the cutting edge into contact with an amount sufficient to restore said cutting edge of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 29
Independent Claim
47 words
A method of restoring a used cutting edge of a drill bit, which comprises bringing the cutting edge into contact with an amount sufficient to restore said cutting edge of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 30
Dependent Claim
42 words
A method as claimed in claim 25, wherein the cutting edge of a drill bit is immersed in an aqueous solution containing chlorhexidine digluconate in a concentration of from 0.1 to 3% by weight and a quaternary ammonium compound as cationic surfactant.
Claim 31
Dependent Claim
12 words
A method as claimed in claim 26, wherein the surfactant is cetrimide.
Claim 32
Dependent Claim
22 words
A method as claimed in claim 27, wherein the surfactant is present in a concentration of from 0.5 to 4% by weight.
Claim 33
Independent Claim
49 words
A method of restoring a cutting surface of a garden or agricultural cutting implement, which comprises bringing the cutting surface into contact with an amount sufficient to restore said cutting surface of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 34
Independent Claim
49 words
A method of restoring a cutting surface of a garden or agricultural cutting implement, which comprises bringing the cutting surface into contact with an amount sufficient to restore said cutting surface of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 35
Dependent Claim
46 words
A method as claimed in claim 29, wherein said cutting surface is brought into contact with an aqueous solution of chlorhexidine digluconate having a concentration of 0.001 to 3% by weight and containing a cationic surfactant in a concentration of from 0.5 to 4% by weight.
Claim 36
Dependent Claim
12 words
A method as claimed in claim 30, wherein the surfactant is cetrimide.
Claim 37
Dependent Claim
46 words
A method as claimed in claim 30, wherein said cutting surface is brought into contact with an aqueous solution of chlorhexidine digluconate having a concentration of 0.001 to 3% by weight and containing a cationic surfactant in a concentration of from 0.5 to 4% by weight.
Claim 38
Dependent Claim
12 words
A method as claimed in claim 32, wherein the surfactant is cetrimide.
Claim 39
Independent Claim
45 words
A method of restoring a cutting surface of a tap, which comprises bringing the cutting surface into contact with an amount sufficient to restore said cutting surface of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 40
Independent Claim
45 words
A method of restoring a cutting surface of a tap, which comprises bringing the cutting surface into contact with an amount sufficient to restore said cutting surface of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 41
Dependent Claim
46 words
A method as claimed in claim 34, wherein said cutting surface is brought into contact with an aqueous solution of chlorhexidine digluconate having a concentration of 0.001 to 3% by weight and containing a cationic surfactant in a concentration of from 0.5 to 4% by weight.
Claim 42
Dependent Claim
12 words
A method as claimed in claim 35, wherein the surfactant is cetrimide.
Claim 43
Independent Claim
45 words
A method of restoring a cutting surface of a die, which comprises bringing the cutting surface into contact with an amount sufficient to restore said cutting surface of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
Claim 44
Independent Claim
45 words
A method of restoring a cutting surface of a die, which comprises bringing the cutting surface into contact with an amount sufficient to restore said cutting surface of a solution or dispersion of a chlorhexidine compound, which solution or dispersion has dispersed therein a surfactant.
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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |