US3140204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inactivating metal surfaces
Assignee: NIHON PARKERISING KABUSHIKI KA
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Filing: 1961-04-26
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Granted: 1964-07-07
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Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 Tokunaga Schizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:29
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD FOR INACTIVATING METAL SURFACES WHICH COMPRISES CONTACTING SAID METAL SURFACES WITH AN AQUEOUS TREATING LIQUID HAVING A PH IN THE RANGE OF FROM ABOUT 5 TO ABOUT 8, SAID LIQUID CONTAINING (A) AT LEAST ONE WATERSOLUBLE THERMO-SETTING RESIN SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE ALKYD MELAMINE RESINS, VEGETABLE OIL MODIFIED ALKYD MELAMINE RESINS AND POLYACRYLIC ACID, (B) A HEXAVALENT CHROMIUM COMPOUND IN AN AMOUNT SUCH THAT THE CRO3 CONTENT OF SAID LIQUID RANGES UP TO A MAXIMUM OF 1.8 GRAMS PER LITER OF SAID LIQUID, AND (C) A CATION AMINE ACTIVATING AGENT CONSISTING OF SODIUM B-AMINOPROPIONATE MODIFIED WITH COCONUT OIL, AND THEREAFTER HEATING SAID TREATED METAL SURFACE TO A TEMPERATURE IN THE RANGE OF FROM ABOUT 110* TO ABOUT 1000*C. TO PROVIDE AN INACTIVATED SURFACE COATING ON SAID METAL.
Claim 2
Independent Claim
132 words
A METHOD FOR INACTIVATING METAL SURFACES WHICH COMPRISES CONTACTING SAID METAL SURFACES WITH AN AQUEOUS TREATING LIQUID HAVING A PH IN THE RANGE OF FROM ABOUT 5 TO ABOUT 8, SAID LIQUID CONTAINING (A) AT LEAST ONE WATERSOLUBLE THERMO-SETTING RESIN SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE ALKYD MELAMINE RESINS, VEGETABLE OIL MODIFIED ALKYD MELAMINE RESINS AND POLYACRYLIC ACID, (B) A HEXAVALENT CHROMIUM COMPOUND IN AN AMOUNT SUCH THAT THE CRO3 CONTENT OF SAID LIQUID RANGES UP TO A MAXIMUM OF 1.8 GRAMS PER LITER OF SAID LIQUID, AND (C) A CATION AMINE ACTIVATING AGENT CONSISTING OF SODIUM B-AMINOPROPIONATE MODIFIED WITH COCONUT OIL, AND THEREAFTER HEATING SAID TREATED METAL SURFACE TO A TEMPERATURE IN THE RANGE OF FROM ABOUT 110* TO ABOUT 1000*C. TO PROVIDE AN INACTIVATED SURFACE COATING ON SAID METAL.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |