US3350285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming rust-proofing and corrosion-resisting coating on metal surfaces
Assignee: NGK Insulators Ltd
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Filing: 1964-06-08
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Granted: 1967-10-31
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Expires: 1984-06-08
Abstract
No abstract record available.
Inventors
- 👤 Nishigaki Susumu
- 👤 Kusaka Takeshi
- 👤 Sato Masanori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:55
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24; C23C22/26; C23C22/28; C25; C25D; C25D11/00; C25D11/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A METHOD OF FORMING RUST-PROOF AND CORROSION-RESISTANT COATINGS ON A METAL FILM SECURED TO A BASE, WHICH COMPRISES DIPPING SAID METAL FILM IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER, A BERYLLIUM SALT SELECTED FROM THE GROUP CONSISTING OF BERYLLIUM HYDROXIDE, BERYLLIUM SULFATE, BERYLLIUM NITRATE, BERYLLIUM HALIDE, BASIC BERYLLIUM ACETATE, BERYLLIUM CITRATE, SODIUM FLUORO BERYLLATE AND POTASSIUM FLUORO BERYLLATE IN THE RANGE FROM 0.005 TO 1.0 WEIGHT PERCENT AS BERYLLIUM ION CONCENTRATION, AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIC ANHYDRIDE, CHROMATE, AND BICHROMATE IN THE RANGE FROM 0.01 TO 30 WEIGHT PERCENT AS CHROMIUM (VI) ION CONCENTRATION, AND A WATER SOLUBLE ORGANIC HIGH MOLECULAR COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, FURFURAL ALCOHOL, POLYETHYLENE OXIDE, AND POLYACRYLIC ACID IN THE RANGE FROM 0.01 TO 5.0 WEIGHT PERCENT, REGULATING THE PH OF SAID SOLUTION IN THE RANGE OF 3.0 TO 6.0, AND PASSING AN ELECTRIC CURRENT HAVING A DENSITY OF 0.01 TO 5.0 AMP/DM.2 THROUGH SAID SOLUTION EMPLOYING SAID METAL FILM AS A CATHODE.
Claim 2
Independent Claim
169 words
A METHOD OF FORMING RUST-PROOF AND CORROSION-RESISTANT COATINGS ON A METAL FILM SECURED TO A BASE, WHICH COMPRISES DIPPING SAID METAL FILM IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER, A BERYLLIUM SALT SELECTED FROM THE GROUP CONSISTING OF BERYLLIUM HYDROXIDE, BERYLLIUM SULFATE, BERYLLIUM NITRATE, BERYLLIUM HALIDE, BASIC BERYLLIUM ACETATE, BERYLLIUM CITRATE, SODIUM FLUORO BERYLLATE AND POTASSIUM FLUORO BERYLLATE IN THE RANGE FROM 0.005 TO 1.0 WEIGHT PERCENT AS BERYLLIUM ION CONCENTRATION, AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIC ANHYDRIDE, CHROMATE, AND BICHROMATE IN THE RANGE FROM 0.01 TO 30 WEIGHT PERCENT AS CHROMIUM (VI) ION CONCENTRATION, AND A WATER SOLUBLE ORGANIC HIGH MOLECULAR COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, FURFURAL ALCOHOL, POLYETHYLENE OXIDE, AND POLYACRYLIC ACID IN THE RANGE FROM 0.01 TO 5.0 WEIGHT PERCENT, REGULATING THE PH OF SAID SOLUTION IN THE RANGE OF 3.0 TO 6.0, AND PASSING AN ELECTRIC CURRENT HAVING A DENSITY OF 0.01 TO 5.0 AMP/DM.2 THROUGH SAID SOLUTION EMPLOYING SAID METAL FILM AS A CATHODE.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |