US3669616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibiting compositions and method
Assignee: TECHNICAL PRODUCTS Corp
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Filing: 1971-09-28
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Granted: 1972-06-13
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Expires: 1991-09-28
Abstract
Abstract COMPOSITIONS AND METHOD FOR INHIBITING CORROSION OF FERROUS AND NON-FERROUS WATER PIPES BY INCLUSION OF A ZINC COMPOUND AND A PHOSPHATE COMPOUND IN THE WATER SUCH THAT THE WEIGHT RATIO OF ZINC ION TO PHOSPHATE ION IS SUBSTANTIALLY 1 TO 1. ZINC ION CONCENTRATION IS IN THE RANGE OF LESS THAN ONE TO ABOUT FIVE PARTS PER MILLION.
Inventors
- 👤 William Bruce Murray
- 👤 Mearl A Kise
- 👤 Thomas Edward Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:56
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/187; C23F11/188
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |