Patent US2978394A successfully refreshed from Google Patents.
US2978394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyelectrolytes in electrolysis
Assignee: Wyeth Holdings LLC
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Filing: 1958-02-25
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Granted: 1961-04-04
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Expires: 1978-02-25
Abstract
No abstract record available.
Inventors
- 👤 Samuel P Moyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:52
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25C; C25C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR ELECTRODEPOSITION OF METALS FROM COMMERCIAL AQUEOUS SYSTEMS IN HTE ELECTROWINING OF ORES AND THE ELECTROPLATING OF METALS WHICH COMPRISES SEQUENTIALLY: INTRODUCING FROM 1 TO 1000 PARTS PER MILLION PARTS OF THE ELECTROLYTE BY WEIGHT OF A WATER-SOLUBLE POLYELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF ACRYLAMIDE HOMOPOLYMERS AND ACRYLAMIDE COPOLYMERS CONTAINING AT LEAST HALF OF THE MONOMER UNITS OF ACRYLAMIDE AND THE OTHER HALF SELECTED FROM MONOMER UNITS CONTAINING AN ALIPHATIC OLEFINIC UNSATURATED LINKAGE, THEN FILTERING NONDISSOLVABLE FINELY DIVIDED IMPURITIES FROM THE ELECTROLYTE, AND THEN ELECTROLYZING TO RECOVER THE METAL FROM THE ELECTROLYTE.
Claim 2
Dependent Claim
95 words
A PROCESS FOR ELECTRODEPOSITION OF METALS FROM COMMERCIAL AQUEOUS SYSTEMS IN HTE ELECTROWINING OF ORES AND THE ELECTROPLATING OF METALS WHICH COMPRISES SEQUENTIALLY: INTRODUCING FROM 1 TO 1000 PARTS PER MILLION PARTS OF THE ELECTROLYTE BY WEIGHT OF A WATER-SOLUBLE POLYELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF ACRYLAMIDE HOMOPOLYMERS AND ACRYLAMIDE COPOLYMERS CONTAINING AT LEAST HALF OF THE MONOMER UNITS OF ACRYLAMIDE AND THE OTHER HALF SELECTED FROM MONOMER UNITS CONTAINING AN ALIPHATIC OLEFINIC UNSATURATED LINKAGE, THEN FILTERING NONDISSOLVABLE FINELY DIVIDED IMPURITIES FROM THE ELECTROLYTE, AND THEN ELECTROLYZING TO RECOVER THE METAL FROM THE ELECTROLYTE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |