Patent US4402609A successfully refreshed from Google Patents.
US2989449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of zinc
Assignee: EIDP Inc
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Filing: 1960-04-06
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Granted: 1961-06-20
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Expires: 1980-04-06
Abstract
No abstract record available.
Inventors
- 👤 Robert W Mackey
- 👤 Donald A Swalheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:25
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22; C25D3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A SINGLE-PHASE LIQUID ADDITIVE FOR AN AQUEOUS ALKALINE CYANIDE-ZINC PLATING BATH COMPRISING BY WEIGHT, 1020% OF AN ALKALI METAL THIOCYANATE, 5-25% OF AN ALICYCLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALICYCLIC ALCOHOLS AND ALICYCLIC KETONES, 2-10% OF A PROTECTIVE COLLOID, 6-20% OF A WATER MISCIBLE ALIPHATIC ALCOHOL HAVING 1-6 CARBON ATOMS, 0.50-1.0% POLYVINYL ALCOHOL, 5-25% OF A SUBSTITUTED AROMATIC ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ANISALDEHYDE, VERATRALDEHYDE, HYDROXYBENZALDEHYDE, PIPERONAL AND MIXTURES THEREOF AND 20-70% WATER.
Claim 2
Dependent Claim
77 words
A SINGLE-PHASE LIQUID ADDITIVE FOR AN AQUEOUS ALKALINE CYANIDE-ZINC PLATING BATH COMPRISING BY WEIGHT, 1020% OF AN ALKALI METAL THIOCYANATE, 5-25% OF AN ALICYCLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALICYCLIC ALCOHOLS AND ALICYCLIC KETONES, 2-10% OF A PROTECTIVE COLLOID, 6-20% OF A WATER MISCIBLE ALIPHATIC ALCOHOL HAVING 1-6 CARBON ATOMS, 0.50-1.0% POLYVINYL ALCOHOL, 5-25% OF A SUBSTITUTED AROMATIC ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ANISALDEHYDE, VERATRALDEHYDE, HYDROXYBENZALDEHYDE, PIPERONAL AND MIXTURES THEREOF AND 20-70% WATER.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |