US3340001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions and method for inhibiting corrosion of metals in aqueous systems
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1964-01-15
•
Granted: 1967-09-05
•
Expires: 1984-01-15
Abstract
No abstract record available.
Inventors
- 👤 Thornhill Raymond Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:22
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A METHOD OF PROTECTING METALS IN CONTACT WITH WATER USED AS A COOLING MEDIUM IN COOLING SYSTEMS FROM CORROSION THEREBY COMPRISING DISSOLVING IN SAID WATER AT LEAST 0.02% OF AN ALKALI METAL NITRATE, AT LEAST 0.03% OF AN ALKALI METAL NITRILE, AND AT LEAST 0.05% OF AN ALKALI METAL SILICATE HAVING THE FORMULA M2O.(SIO2) N WHEREIN M REPRESENTS THE ALKALI METAL AND N IS GREATER THAN 1.0, AND AT LEAST 0.0125% OF AN ORGANIC NITROGEN COMPOUND CHOSEN FROM THE GROUP CONSISTING OF SODIUM MERCAPTOBENZTHIAZOLE AND BENZTRIAZOLE, ALL SAID PERCENTAGES BEING BY WEIGHT.
References Cited (Backward Citations)
US2877188A
Cited
US3110684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |