Method for inhibiting corrosion and mineral deposits in water systems
Abstract
Abstract ADDITION TO A WATER SYSTEM A COMPOSITION COMPRISING A COMPOUND HAVING THE FOLLOWING FORMULA (HO-)2P(=O)-C(-R)(-X)-P(=O)(-OH)2 WHEREIN X IS OH OR NH2, AND R IS ALKYL RADICAL OF 1 TO 5 ATOMS; AND A WATER-SOLUBLE, CONPLEX-FORMING COMPOUND WHICH CONTAINS AT LEAST ONE PHOSPHONATE OR N-DIMETHYLENE PHOSPHONOC ACID GROUP. WATER-SOLUBLE SALTS OF THE FIRSTMENTIONED COMPOUND CAN ALSO BE USED. RELATIVE AMOUNTS OF THE COMPOUNDS IN THE COMPOSITION VARIES FROM A MOLAR RATIO OF FROM 1:3 TO 3:1, RESPECTIVELY. AMOUNT OF THE COMPOSITION TO BE USED IN WATER MAY VARY FROM MG./ LITER AND UP TO 150% OF THE QUANTITY OF COMPOSITION NECESSARY FOR SUBSTANTIALLY COMPLETELY CONVERTING INTO COMPLEXES THE SUBSTANCES IMPARTING HARDNESS TO THE WATER.
Inventors
- 👤 Freyhold H Von
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |