US3110666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preventing deposition of copper and iron salts from alkaline aqueous solutions
Assignee: Wyeth Holdings LLC
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Filing: 1960-05-18
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Granted: 1963-11-12
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Expires: 1980-05-18
Abstract
No abstract record available.
Inventors
- 👤 Hedley Norman
- 👤 Tabachnick Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:56
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; F; F28; F28F; F28F19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR INHIBITING THE DEPOSITION OF IRON COMPOUNDS WHICH COMPRISES ADDING TO AN AQUEOUS SOLUTION HAVING A PH BELOW 6 AND CONTAINING AT LEST 5 PARTS PER MILLION OF IRON AS IRON SALTS A WATER-SOLUBLE POLYELECTROLYTE HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 20000 HAVING A STRUCTURE DERIVED BY THE SUBSTANTIALLY LINEAR POLYMERIZATION OF AT LEAST ONE MONO-OLEFINIC COMPOUND THROUGH THE ALIPHATIC UNSATURATED BOND AND THEREAFTER ADJUSTING THE PH OF SAID SOLUTION TO A VALUE OF AT LEAST 7.5 WHEREBY PRECIPITATION OF SAID IRON SALTS IS PREVENTED FOR LONG PERIODS.
Claim 2
Dependent Claim
92 words
A PROCESS FOR INHIBITING THE DEPOSITION OF IRON COMPOUNDS WHICH COMPRISES ADDING TO AN AQUEOUS SOLUTION HAVING A PH BELOW 6 AND CONTAINING AT LEST 5 PARTS PER MILLION OF IRON AS IRON SALTS A WATER-SOLUBLE POLYELECTROLYTE HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 20000 HAVING A STRUCTURE DERIVED BY THE SUBSTANTIALLY LINEAR POLYMERIZATION OF AT LEAST ONE MONO-OLEFINIC COMPOUND THROUGH THE ALIPHATIC UNSATURATED BOND AND THEREAFTER ADJUSTING THE PH OF SAID SOLUTION TO A VALUE OF AT LEAST 7.5 WHEREBY PRECIPITATION OF SAID IRON SALTS IS PREVENTED FOR LONG PERIODS.
References Cited (Backward Citations)
US2729557A
Cited
US2980610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |