US3822194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid zinc electroplating
Assignee: EIDP Inc
•
Filing: 1971-06-28
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Granted: 1974-07-02
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Expires: 1991-06-28
Abstract
Abstract ACID ZINC ELECTROPLATING BATHS AT PH 2.5 TO 5.5 ARE PROVIDED WHICH USE AS ADDITIVES COMPOUNS WITH THE GENERAL FORMULA: 1-(YX-),3-R,R''-PYRIDINIUM Z(-) WHEREIN R IS -CONH2, -CH, -CONHNH2, -COOH OR -COOR "COOR" WHERE R" IS AN ALKYL GROUP OF 1 TO 4 CARBON ATOMS, R'' IS HYDROGEN, HALOGEN OR AN ALKYL GROUP OF 1 TO 4 CARBON ATOMS, X IS AN ALKYL GROUP OF 1 TO 8 CARBON ATOMS, Y IS -COOH, -COO-, -SO3H, -SO3- OR -CONH2, AND Z- IS A HALIDE ION OR IS ABSENT WHEN Y IS -COO- OR -SO3-.
Inventors
- 👤 J Rushmere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:19
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |