US2874081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pretreatment solution for phosphate coating, method of preparing the same and process of treating metal surfaces
Assignee: Parker Rust Proof Co
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Filing: 1956-08-02
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Granted: 1959-02-17
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Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Walter R Cavanagh
- 👤 James I Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:28
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/78; C23C22/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A METHOD OF FORMING A DRIED ACTIVATING COMPOSITION WHICH COMPRISES THE STEPS OF FORMING AN AQUEOUS SLURRY CONSISTING ESSENTAILLY OF A TITANIUM-CONTAINING COMPOUND AND APHOSPHATED OF SODIUM COMPOUND, SAID TITANIUM-CONTAINING COMPOUND AND SAID PHOSPHATEOF SODIUM COMPOUND BEING PRESENT IN SUCH PROPORTIONS AS TO PRODUCE A PH OF SAID SLURRY IN THE RANGE OF ABOUT 5.M TO ABOUT 7.8 MIXING THE SLURRY AT A TEMPERATURE BELOW ABOUT 75*F. AND THEREAFTER RAISING THE TEMPERATURE OF THE MIXED SLURRY FOR A PERIOD OF TIME AND AT A TEMPERATURE SUFFICIENTLY ELEVATED TO AGE THE SLURRY SO THAT A DRIED ACTIVATING COMPOSITION CAN BE EVOLVED THREEFROM WHICH WHEN DISSOLVED IN AQUEOUS SOLUTION IS CAPABLE OF ACTIVATING METAL SURFACES FOR SUBSEQUENT REACTION WITH PHOSPHATE COATING SOLUTIONS, AND THEREAFTER DRYING THE AGED SLURRY TO PRODUCE A DRIED ACTIVATED COMPOSITION CONTAINING AT LEAST 0.005% TITANIUM BASED ON THE COMBINED WEIGHT OF SAID TITANIUM-CONTAINING COMPOUND AND SAID PHOSPHATE DODIUM COMPOUND IN SAID DRIED ACTIVATING COMPOSITION.
Claim 2
Independent Claim
156 words
A METHOD OF FORMING A DRIED ACTIVATING COMPOSITION WHICH COMPRISES THE STEPS OF FORMING AN AQUEOUS SLURRY CONSISTING ESSENTAILLY OF A TITANIUM-CONTAINING COMPOUND AND APHOSPHATED OF SODIUM COMPOUND, SAID TITANIUM-CONTAINING COMPOUND AND SAID PHOSPHATEOF SODIUM COMPOUND BEING PRESENT IN SUCH PROPORTIONS AS TO PRODUCE A PH OF SAID SLURRY IN THE RANGE OF ABOUT 5.M TO ABOUT 7.8 MIXING THE SLURRY AT A TEMPERATURE BELOW ABOUT 75*F. AND THEREAFTER RAISING THE TEMPERATURE OF THE MIXED SLURRY FOR A PERIOD OF TIME AND AT A TEMPERATURE SUFFICIENTLY ELEVATED TO AGE THE SLURRY SO THAT A DRIED ACTIVATING COMPOSITION CAN BE EVOLVED THREEFROM WHICH WHEN DISSOLVED IN AQUEOUS SOLUTION IS CAPABLE OF ACTIVATING METAL SURFACES FOR SUBSEQUENT REACTION WITH PHOSPHATE COATING SOLUTIONS, AND THEREAFTER DRYING THE AGED SLURRY TO PRODUCE A DRIED ACTIVATED COMPOSITION CONTAINING AT LEAST 0.005% TITANIUM BASED ON THE COMBINED WEIGHT OF SAID TITANIUM-CONTAINING COMPOUND AND SAID PHOSPHATE DODIUM COMPOUND IN SAID DRIED ACTIVATING COMPOSITION.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |