US5435941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco extract composition and method
Assignee: University of Louisville
•
Filing: 1994-12-06
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Granted: 1995-07-25
•
Expires: 2014-12-06
Abstract
Abstract A method of extracting corrosion inhibiting constituents from tobacco comprises the steps of soaking tobacco in an aqueous solution under certain extraction conditions, followed by filtration to remove tobacco residue from the resultant aqueous tobacco solution. This tobacco solution is used as a corrosion inhibitor to minimize the amount of corrosion occurring at galvanic corrosion cells that are established at areas of union of metals having different electrochemical potentials.
Inventors
- 👤 Joseph A. Von Fraunhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:57
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/082; C09D5/086; C23; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
72 words
A method of inhibiting corrosion on a metallic surface, comprising the steps of: a. introducing tobacco into an aqueous solution; b. filtering said aqueous solution to remove solid tobacco residue from said aqueous solution; and c. treating the metallic surface for a pre-determined period of time with the aqueous solution filtered in accordance with step "b"; wherein the aqueous solution filtered in accordance with step "b" inhibits corrosion on the metallic surface.
Claim 2
Independent Claim
72 words
A method of inhibiting corrosion on a metallic surface, comprising the steps of: a. introducing tobacco into an aqueous solution; b. filtering said aqueous solution to remove solid tobacco residue from said aqueous solution; and c. treating the metallic surface for a pre-determined period of time with the aqueous solution filtered in accordance with step "b"; wherein the aqueous solution filtered in accordance with step "b" inhibits corrosion on the metallic surface.
Claim 3
Dependent Claim
20 words
A method as set forth in claim 1, further comprising the step of agitating said tobacco in said aqueous solution.
Claim 4
Dependent Claim
27 words
A method as set forth in claim 2, further comprising the step of heating said aqueous solution prior to the introduction of tobacco into said aqueous solution.
Claim 5
Dependent Claim
26 words
A method as set forth in claim 3, further comprising the step of heating said aqueous solution to a temperature of approximately 65° C. (149° F.).
Claim 6
Dependent Claim
33 words
A method as set forth in claim 3, further comprising the step of heating said aqueous solution during said agitating step in order to maintain said aqueous solution at a pre-determined approximate temperature.
Claim 7
Dependent Claim
20 words
A method as set forth in claim 2, wherein said agitating step is effected for at least approximately two hours.
Claim 8
Independent Claim
83 words
A method of inhibiting corrosion on a metallic surface comprising the steps of: a. preparing at least a 1% by weight saline aqueous solution; b. introducing tobacco into said aqueous solution; c. filtering said aqueous solution to remove solid tobacco residue from said aqueous solution; and d. treating the metallic surface for a pre-determined period of time with the aqueous solution filtered in accordance with step "c"; wherein the aqueous solution filtered in accordance with step "c" inhibits corrosion on the metallic surface.
Claim 9
Independent Claim
83 words
A method of inhibiting corrosion on a metallic surface comprising the steps of: a. preparing at least a 1% by weight saline aqueous solution; b. introducing tobacco into said aqueous solution; c. filtering said aqueous solution to remove solid tobacco residue from said aqueous solution; and d. treating the metallic surface for a pre-determined period of time with the aqueous solution filtered in accordance with step "c"; wherein the aqueous solution filtered in accordance with step "c" inhibits corrosion on the metallic surface.
Claim 10
Dependent Claim
20 words
A method as set forth in claim 7, further comprising the step of agitating said tobacco in said aqueous solution.
Claim 11
Dependent Claim
27 words
A method as set forth in claim 8, further comprising the step of heating said aqueous solution prior to the introduction of tobacco into said aqueous solution.
Claim 12
Dependent Claim
26 words
A method as set forth in claim 9, further comprising the step of heating said aqueous solution to a temperature of approximately 65° C. (149° F.).
Claim 13
Dependent Claim
33 words
A method as set forth in claim 9, further comprising the step of heating said aqueous solution during said agitating step in order to maintain said aqueous solution at a pre-determined approximate temperature.
Claim 14
Dependent Claim
20 words
A method as set forth in claim 8, wherein said agitating step is effected for at least approximately two hours.
Claim 15
Independent Claim
53 words
A method of inhibiting corrosion on a metallic surface, comprising the steps of: a. extracting metallic corrosion inhibitors from tobacco; and b. treating the metallic surface with the metallic corrosion inhibitors extracted in accordance with step "a"; wherein the corrosion inhibitors extracted in accordance with step "a" inhibit corrosion on the metallic surface.
Claim 16
Independent Claim
53 words
A method of inhibiting corrosion on a metallic surface, comprising the steps of: a. extracting metallic corrosion inhibitors from tobacco; and b. treating the metallic surface with the metallic corrosion inhibitors extracted in accordance with step "a"; wherein the corrosion inhibitors extracted in accordance with step "a" inhibit corrosion on the metallic surface.
Claim 17
Dependent Claim
43 words
A method as set forth in claim 13, wherein step "b" includes the further steps of: c. mixing the metallic corrosion inhibitors with another metallic coating, and d. coating the metallic surface with the other metallic coating which includes the metallic corrosion inhibitor.
Claim 18
Dependent Claim
16 words
A method as set forth in claim 14, wherein the other metallic coating is paint. PG,21
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-24 | 1999-01-23 | 1999-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-24 | 2003-01-23 | 2003-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-24 | 2007-01-23 | 2007-07-25 | $7700.00 | Window Closed / Lapsed |