US3275566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion-inhibited phosphate solutions
Assignee: Monsanto Co
•
Filing: 1965-09-16
•
Granted: 1966-09-27
•
Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Robert P Langguth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:14
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/182
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A LIQUID AQUEOUS AMMONIUM PHOSPHATE SOLUTION HAVING A PH ABOVE ABOUT 7.2 AND IN CONTACT WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND COPPER ALLOYS; SAID SOLUTION CONSISTING ESSENTIALLY OF AT LEAST ABOUT 0.5 WEIGHT PERCENT OF AN AMMONIUM PHOSPHATE SALT DISSOLVED THEREIN SELECTED FROM THE GROUP CONSISTING OF MONOAMMONIUM ORTHOPHOSPHATE, DIAMMONIUM ORTHOPHOSPHATE AND MIXTURES THEREOF AND FROM ABOUT 0.10 TO ABOUT 10 WEIGHT PERCENT OF A WATER SOLUBLE INORGANIC THIOSULFATE COMPOUND DISSOLVED THEREIN.
Claim 2
Dependent Claim
77 words
A LIQUID AQUEOUS AMMONIUM PHOSPHATE SOLUTION HAVING A PH ABOVE ABOUT 7.2 AND IN CONTACT WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND COPPER ALLOYS; SAID SOLUTION CONSISTING ESSENTIALLY OF AT LEAST ABOUT 0.5 WEIGHT PERCENT OF AN AMMONIUM PHOSPHATE SALT DISSOLVED THEREIN SELECTED FROM THE GROUP CONSISTING OF MONOAMMONIUM ORTHOPHOSPHATE, DIAMMONIUM ORTHOPHOSPHATE AND MIXTURES THEREOF AND FROM ABOUT 0.10 TO ABOUT 10 WEIGHT PERCENT OF A WATER SOLUBLE INORGANIC THIOSULFATE COMPOUND DISSOLVED THEREIN.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |