Zinc electroplating additive
Abstract
Abstract AQUEOUS ADDITION AGENTS FOR ZINC ELECTROPLATING BATHS ARE PROVIDED WHICH HAVE DISSOLVED THEREIN (A) A PYRIDINIUM COMPOUND OF THE GENERAL FORMULA: 1-R'',3-R-PYRIDINIUM X(-) WHEREIN R IS -CONH2,-CN,-CHO OR -COOR", R'' IS AN ALKYL GROUP OF 1-4 CARBON ATOMS, -CH2CH=CH2,-CH2C=CH, -CH2CH=CHCH2X, -CH2COOR" OR -CH2-CH=CH-CH2-(3-R-PYRID-1-YL) X(-) R" IS AN ALKYL GROUP OF 1-4 CARBON ATOM, AND X-IS A HALOGEN ION, AND (B) A POLYSTYRENESULFONATE, A POLYVINYLPYRROLIDONE, A POLYOOXYALKYLDIAMINE, A WATER-SOLUBLE QUATERIZED CONDENSATION PRODUCT OF AN EPIHALOHYDRIN AND A POLYAMINE, OR A WATER-SOLUBLE CONDENSATION PRODUCT OF A BENZENE OR A NAPHTHALENE SULFONIC ACID, OR A SALT THEREOF, WITH FORMALDEHYDE, SAID CONDENSATION PRODUCT CONTAINING AT LEAST 2 BENZENE OR NAPHTHALENE SULFONIC ACID GROUP CONNECTED WITH EACH OTHER BY METHYLENE BRIDGES.
Inventors
- 👤 J Rushmere
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |