US3309324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibited ammonium sulfate solutions and compositions useful for manufacturing them
Assignee: Monsanto Co
•
Filing: 1963-12-23
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Granted: 1967-03-14
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Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert P Langguth
- 👤 William W Morgenthaler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:08
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C01; C01C; C01C1/00; C01C1/24; C23F11/10; C23F11/14; C23F11/149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
AN AQUEOUS DIAMMONIUM SULFATE COMPOSITION, IN CONTACT WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND COPPER ALLOYS, WHICH CONTAINS DISSOLVED THEREIN, IN ADDITION TO SAID DIAMMONIUM SULFATE, A WATER SOLUBLE COOPER CORROSION INHIBITING MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL-, AMMONIUM-, MAGNESIUM- AND CALCIUM-IODIDES, THIOCYANATES, FERRICYANIDES, FERROCYANIDES, AND THIOSULFATES, AND 8-HYDROXYQUINOLINE, THE WEIGHT RATIO BETWEEN SAID DIAMMONIUM SULFATE AND SAID CORROSION INHIBITING MATERIAL BEING FROM ABOUT 6000:1 TO ABOUT 30:1.
Claim 2
Dependent Claim
75 words
AN AQUEOUS DIAMMONIUM SULFATE COMPOSITION, IN CONTACT WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND COPPER ALLOYS, WHICH CONTAINS DISSOLVED THEREIN, IN ADDITION TO SAID DIAMMONIUM SULFATE, A WATER SOLUBLE COOPER CORROSION INHIBITING MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL-, AMMONIUM-, MAGNESIUM- AND CALCIUM-IODIDES, THIOCYANATES, FERRICYANIDES, FERROCYANIDES, AND THIOSULFATES, AND 8-HYDROXYQUINOLINE, THE WEIGHT RATIO BETWEEN SAID DIAMMONIUM SULFATE AND SAID CORROSION INHIBITING MATERIAL BEING FROM ABOUT 6000:1 TO ABOUT 30:1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |