US3679381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel composite
Assignee: M&T Chemicals Inc
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Filing: 1970-08-21
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Granted: 1972-07-25
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Expires: 1990-08-21
Abstract
Abstract THIS INVENTION RELATES TO NEW PROCESSES AND TO A NOVEL CORROSION RESISTANT BRIGHT DECORATIVE CHROMIUM COMPOSITE METAL COATED ARTICLE COMPRISING: (1) A FIRST LAYER OF COPPER; (2) A SECOND THIN LAYER OF BRIGHT COBALT THEREON; (3) A THIRD THIN LAYER CONTAINING NICKEL HAVING A THICKNESS OF 2-12 MICRONS; AND (4) A FOURTH LAYER OF BRIGHT DECORATIVE CHROMIUM ON SAID THIRD NICKEL-CONTAINING LAYER TO FORM AN ARTICLE BEARING A CORROSION RESISTANT BRIGHT DECORATIVE CHROMIUM SURFACE.
Inventors
- 👤 Hyman Chessin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:27
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/10; C25D5/12; C25D5/14; C25D5/60; C25D5/605; C25D5/611; C25D5/623; C25D5/625; C25D5/627; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/927; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12389; Y10T428/12396; Y10T428/12479; Y10T428/12493; Y10T428/1266; Y10T428/12771; Y10T428/12861; Y10T428/12882; Y10T428/12903; Y10T428/1291; Y10T428/25; Y10T428/254
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |