US3589858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting the corrosion of metals in a water system
Assignee: Calgon Corp
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Filing: 1965-08-20
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Granted: 1971-06-29
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Expires: 1985-08-20
Abstract
Abstract THE CORROSION OF METALS IN A WATER SYSTEM IS INHIBITED BY ADDING TO THE WATER A GLASSY COMPOSITION CONSISTS OF 36 TO 42 MOLAR PERCENT P2O58 7.3 TO 14.2 MOLAR PERCENT ZNO, 4.4 TO 56.7 MOLAR PERCENT K2O, AND UP TO 52.3 MOLAR PERCENT NA2O.
Inventors
- 👤 Paul H Ralston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:35
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/184; C03; C03C; C03C3/00; C03C3/12; C03C3/16
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |