US3901836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rust preventative coating for metallic surfaces consisting of water-soluble resin and sodium benzoate-potassium tripolyphosphate rust inhibitor
Assignee: CHEM PAINT SPECIALTIES Inc
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Filing: 1973-10-04
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Granted: 1975-08-26
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Expires: 1993-10-04
Abstract
Abstract A rust preventative for ferrous surfaces comprises by weight from 15 to 75% of phosphoric acid, from 5 to 25% of a water soluble resin, from 5 to 20% of a rust inhibitor wherein the rust inhibitor contains from 25 to 95% of sodium benzoate and from 5 to 75% of potassium chromate, potassium dichromate or potassium tripolyphosphate, from 1 to 10% of a wetting agent and an amount of water to bring the total amount of ingredients to 100%.
Inventors
- 👤 John A Kader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:40
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/23
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
104 words
A RUST PREVENTATIVE FOR METALLIC SURFACES COMPRISING BY WEIGHT FROM ABOUT 15 TO ABOUT 75% OF PHOSPHORIC ACID (85% GRADE), FROM ABOUT 5 TO ABOUT 25% OF A WATER SOLUBLE RESIN SELECTED FROM THE CLASS CONSISTING OF HYDROXMETHYLCELLULOSE, METHYLCELLULOSE, POLYVINYL ALCOHOL, AND POLYACRYLAMIDE, FROM ABOUT 5 TO ABOUT 20% OF A RUST INHIBITOR, SAID RUST INHIBITOR CONTAINING FROM ABOUT 25 TO ABOUT 95% BY WEIGHT OF SODIUM BENZOATE AND FROM ABOUT 5 TO ABOUT 75% BY WEIGHT OF POTASSIUM TRIPOLYPHOSPHATE, FROM ABOUT 1 TO ABOUT 10% OF A WETTING AGENT AND AN AMOUNT OF WATER TO BRING THE TOTAL AMOUNT OF INGREDIENTS TO 100%.
Claim 2
Dependent Claim
104 words
A RUST PREVENTATIVE FOR METALLIC SURFACES COMPRISING BY WEIGHT FROM ABOUT 15 TO ABOUT 75% OF PHOSPHORIC ACID (85% GRADE), FROM ABOUT 5 TO ABOUT 25% OF A WATER SOLUBLE RESIN SELECTED FROM THE CLASS CONSISTING OF HYDROXMETHYLCELLULOSE, METHYLCELLULOSE, POLYVINYL ALCOHOL, AND POLYACRYLAMIDE, FROM ABOUT 5 TO ABOUT 20% OF A RUST INHIBITOR, SAID RUST INHIBITOR CONTAINING FROM ABOUT 25 TO ABOUT 95% BY WEIGHT OF SODIUM BENZOATE AND FROM ABOUT 5 TO ABOUT 75% BY WEIGHT OF POTASSIUM TRIPOLYPHOSPHATE, FROM ABOUT 1 TO ABOUT 10% OF A WETTING AGENT AND AN AMOUNT OF WATER TO BRING THE TOTAL AMOUNT OF INGREDIENTS TO 100%.
Claim 3
Dependent Claim
22 words
A rust preventative for metallic surfaces as in claim 1, wherein said phosphoric acid range is from about 20 to about 30%.
Claim 4
Dependent Claim
33 words
A rust preventative for metallic surfaces as in claim 2, wherein said sodium benzoate range is from about 65 to about 95% and said potassium tripolyphosphate range is from 5 to about 35%.
Claim 5
Dependent Claim
20 words
A rust preventative for metallic surfaces as in claim 3, wherein the amount of said phosphoric acid is approximately 25%.
Claim 6
Dependent Claim
23 words
A rust preventative for metallic surfaces as in claim 3, wherein said water soluble resin range is from about 5 to about 15%.
Claim 7
Dependent Claim
21 words
A rust preventative for metallic surfaces as in claim 5, wherein the amount of said water soluble resin is approximately 10%.
Claim 8
Dependent Claim
18 words
A rust preventative for metallic surfaces as in claim 3, wherein said water soluble resin is polyvinyl alcohol.
Claim 9
Dependent Claim
19 words
A rust preventative for metallic surfaces as in claim 3, wherein the amount of rust inhibitor is approximately 10%.
Claim 10
Dependent Claim
30 words
A rust preventative for metallic surfaces as in claim 3, wherein the amount of said sodium benzoate is approximately 80% and the amount of said potassium tripolyphosphate is approximately 20%.
Claim 11
Dependent Claim
20 words
A rust preventative for metallic surfaces as in claim 3, wherein the amount of said wetting agent is approximately 5%.
Claim 12
Dependent Claim
29 words
A rust preventative for metallic surfaces as in claim 3, wherein said wetting agent is selected from the class consisting of sodium dialkyl sulfosuccinates, naphthalenesulfonates and sodium alkyl sulfates.
Claim 13
Dependent Claim
31 words
A rust preventative for metallic surfaces as in claim 11, wherein said wetting agents are selected from the class consisting of sodium heptadecyl sulfate, sodium tetradecyl sulfate and sodium 2-ethylhexyl sulfate.
References Cited (Backward Citations)
US2478756A
Cited
US2711391A
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US3036934A
Cited
US3067044A
Cited
US3248350A
Cited
US3523835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |