US3702285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the pretreatment of plastic for the purpose of adhesive metallization
Assignee: Evonik Operations GmbH
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Filing: 1969-07-07
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Granted: 1972-11-07
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Expires: 1989-07-07
Abstract
Abstract THERE IS PROVIDED A PROCESS FOR THE ADHESIVE METALLIZATION OF PLASTIC SURFACES INCLUDING A CHROMOSULFURIC ETCH AND SUBSEQUENT CHEMICAL METALLIZATION AND ELECTROPLATING AND IMPROVEMENT IN WHICH THE PLASTIC SAMPLE, AFTER THE CHROMOSULFURIC ACID ETCHING, IS PREFERABLY TREATED IN AN AQUEOUS ALKALINE INTERMEDIATE BATH CONTAINING AMMONIA OR A MATERIAL HAVING, PRIMARY, SECONDARY OR TERTIARY AMINO GROUPS AND/OR CONTAINING A QUATERNARY AMMONIUM COMPOUND.
Inventors
- 👤 Helmut Knorre
- 👤 Eugen Meyer-Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:01
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/2006; C23C18/2046; C23C18/2073; C23C18/208; C23C18/22; C23C18/24; C23C18/30
Claims Analysis
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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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |