US3900504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cuprammonium acetate complex and method of preparing
Assignee: Mineral Research and Development Corp
•
Filing: 1972-02-04
•
Granted: 1975-08-19
•
Expires: 1992-02-04
Abstract
Abstract A fungicidal composition substantially non-corrosive to metals and suitable for spray type application comprising a cuprammonium acetate complex in a solution whose pH is slightly basic. The metal values are retained in solution in the critical pH range while the ammonium component is bound in the complex. The metal values are precipitated by hydrolyzing the complex as by way of substantial dilutions.
Inventors
- 👤 Hans Woerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:30
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/005; A; A01; A01N; A01N37/00; A01N37/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A METHOD FOR PRODUCING A SUBSTANTIALLY NON-CORROSIVE CUPRAMMONIUM ACETATE COMPLEX COMPRISING REACTING AT ATMOSPHERIC TEMPREATURE AND PRESSURE COPPER ACETATE AND AMMONIUM ACETATE IN A DILUTE AQUEOUS AMMONIA SOLUTION AT A PH BETWEEN ABOUT 7.1 TO 7.4, SAID REACTION PROPORTIONS BEING IN AMOUNTS TO PROVIDE AN AQUEOUS SOLUTION HAVING A COPPER CONTENT OF ABOUT 8 TO 8.2 PERCENT BY WEIGHT.
Claim 2
Independent Claim
59 words
A METHOD FOR PRODUCING A SUBSTANTIALLY NON-CORROSIVE CUPRAMMONIUM ACETATE COMPLEX COMPRISING REACTING AT ATMOSPHERIC TEMPREATURE AND PRESSURE COPPER ACETATE AND AMMONIUM ACETATE IN A DILUTE AQUEOUS AMMONIA SOLUTION AT A PH BETWEEN ABOUT 7.1 TO 7.4, SAID REACTION PROPORTIONS BEING IN AMOUNTS TO PROVIDE AN AQUEOUS SOLUTION HAVING A COPPER CONTENT OF ABOUT 8 TO 8.2 PERCENT BY WEIGHT.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein the copper acetate is reacted in said aqueous ammonia solution with ammonium acetate in a weight ratio of about 13 to 2 wherein the copper acetate is measured as the dihydrate.
Claim 4
Dependent Claim
46 words
The method of claim 2 wherein the complex is formed by reacting weight proportions of about 13 parts of copper acetate as measured as the dihydrate, about 2 parts of ammonium acetate, about 10 parts of 29 percent aqueous ammonia in about 22 parts of water.
References Cited (Backward Citations)
US1589644A
Cited
US1598982A
Cited
US1988752A
Cited
US2159864A
Cited
US2441400A
Cited
US2423619A
Cited
US2383784A
Cited
US2434402A
Cited
US2444945A
Cited
US2455687A
Cited
US2604485A
Cited
US2651648A
Cited
US2695858A
Cited
US2824886A
Cited
US3078213A
Cited
US3360536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |