US3223649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion-inhibited phosphate solutions and compositions useful for manufacturing them
Assignee: Monsanto Co
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Filing: 1962-11-06
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Granted: 1965-12-14
•
Expires: 1982-11-06
Abstract
No abstract record available.
Inventors
- 👤 Robert P Langguth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:25
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/182
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A CONCENTRATED AMMONIUM PHOSPHATE COMPOSITION USEFUL WHEN DILUTED AND DISSOLVED IN WATER TO PROTECT COPPER AND COPPER ALLOYS FROM CORROSION ORDINARILY CAUSED BY AQUEOUS SOLUTIONS OF AMMONIUM PHOSPHATE, SAID COMPOSITION CONSISTING ESSENTIALLY OF A WATER-SOLUBLE INORGANIC WATER SOLUBLE SULFITE COMPOUND AND AT LEAST ONE AMMONIUM ORTHOPHOSPHATE SALT; THE WEIGHT RATIO OF SAID AMMOMIUM ORTHOPHOSPHATE SALT TO SAID SULFITE COMPOUND IN SAID COMPOSITION BEING FROM ABOUT 3800:1 TO ABOUT 10:1.
Claim 2
Dependent Claim
69 words
A CONCENTRATED AMMONIUM PHOSPHATE COMPOSITION USEFUL WHEN DILUTED AND DISSOLVED IN WATER TO PROTECT COPPER AND COPPER ALLOYS FROM CORROSION ORDINARILY CAUSED BY AQUEOUS SOLUTIONS OF AMMONIUM PHOSPHATE, SAID COMPOSITION CONSISTING ESSENTIALLY OF A WATER-SOLUBLE INORGANIC WATER SOLUBLE SULFITE COMPOUND AND AT LEAST ONE AMMONIUM ORTHOPHOSPHATE SALT; THE WEIGHT RATIO OF SAID AMMOMIUM ORTHOPHOSPHATE SALT TO SAID SULFITE COMPOUND IN SAID COMPOSITION BEING FROM ABOUT 3800:1 TO ABOUT 10:1.
References Cited (Backward Citations)
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Cited
USRE25394E
Cited
US1997669A
Cited
US2303399A
Cited
US2636009A
Cited
US2617713A
Cited
US2901428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |