US3102830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Establishment of ph value of a phosphoric acid solution by its reaction with iron prior to its use to treat ferrous surfaces
Assignee: Individual
•
Filing: 1961-03-20
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Granted: 1963-09-03
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 Duchange Guillaume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:49
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24; C23C22/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
AN ANTI-CORROSION TREATMENT OF FERROUS SURFACES, CONSISTING IN DISSOLVING IN 760 PARTS BY VOLUME OF WATER 12 PARTS BY WEIGHT OF SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM BICHROMATE AND POTASSIUM BICHROMATE, 6 PARTS BY WEIGHT OF A SLAT SELECTED FROM THE GROUP CONSISTING OF TRISODIUM PHOSPHATE, DISODIUM PHSOSPHATE AND MONOSODIUM PHOSPHATE, 240 PARYS BY VOLUME OF 58*B. ORTHOPHOSPHORIC ACID, ADDING TO THE RESULTING SOLUTION 7.60 PARTS BY WEIGHT OF A ZINC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE AND ZINC SULFATE, REACTING THE MIXTURE SO FORMED WITH IRON BY IMMERGING THEREIN AN IRON PIECE UNTIL SAID MIXTURE SHOWS A GREEN COLOR AND HAS A PH VALUE OF 2.5, ADDING 10 TO 12 PARTS BY WEIGHT OF A CELLULOSE ESTER TO THE GREEN-COLORED MIXTURE, AND APPLYING THE SAME TO SAID FERROUS SURFACES.
Claim 2
Dependent Claim
135 words
AN ANTI-CORROSION TREATMENT OF FERROUS SURFACES, CONSISTING IN DISSOLVING IN 760 PARTS BY VOLUME OF WATER 12 PARTS BY WEIGHT OF SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM BICHROMATE AND POTASSIUM BICHROMATE, 6 PARTS BY WEIGHT OF A SLAT SELECTED FROM THE GROUP CONSISTING OF TRISODIUM PHOSPHATE, DISODIUM PHSOSPHATE AND MONOSODIUM PHOSPHATE, 240 PARYS BY VOLUME OF 58*B. ORTHOPHOSPHORIC ACID, ADDING TO THE RESULTING SOLUTION 7.60 PARTS BY WEIGHT OF A ZINC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE AND ZINC SULFATE, REACTING THE MIXTURE SO FORMED WITH IRON BY IMMERGING THEREIN AN IRON PIECE UNTIL SAID MIXTURE SHOWS A GREEN COLOR AND HAS A PH VALUE OF 2.5, ADDING 10 TO 12 PARTS BY WEIGHT OF A CELLULOSE ESTER TO THE GREEN-COLORED MIXTURE, AND APPLYING THE SAME TO SAID FERROUS SURFACES.
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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |