US3556839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroless metal coating
Assignee: Industrial Distributors 1946 Ltd
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Filing: 1967-10-24
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Granted: 1971-01-19
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Expires: 1987-10-24
Abstract
Abstract THE INVENTION CONCERNS A PROCESS FOR COATING OBJECTS, AND IN PARTICULAR, NATURAL OR SYNTHETIC DIAMONDS, WITH NICKEL OF COBALT, BY CONTACTING THE OBJECTS WITH A SOLUTION CONTAINING IONS OF THE PATRICULAR METAL AND A SOLUTION CONTAINING BETWEEN 0.001 AND 0.035 MOLE PER LITRE OF HYPOPHOSPHITE IONS. D R A W I N G
Inventors
- 👤 Alexander R Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:56
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |