Patent US2548867A successfully refreshed from Google Patents.
US2548867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating metals
Assignee: Poor and Co
•
Filing: 1945-04-14
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Granted: 1951-04-17
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Expires: 1965-04-14
Abstract
No abstract record available.
Inventors
- 👤 Allan E Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:43
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/18; C25D5/60; C25D5/605; C25D5/611; C25D5/627; Y; Y10; Y10S; Y10S204/00; Y10S204/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF ELECTRODEPOSITING BRIGHT PLATES OF METALS FROM ALKALINE BATHS WHICH COMPRISES PASSING A PLATING ELECTRIC CURRENT INCLUDING DIRECT AND ALTERNATING CURRENT COMPONENTS OF ABNORMAL ASYMMETRIC SINE WAVE FROM HAVING PEAKS AND VALLEYS THROUGH AN ALKALINE PLATING BATH OF A METAL FROM THE GROUP CONSISTING OF ZINC, CADMIUM, COPPER AND TIN, THE VALLEY VOLTAGE OF THE WAVE FORM BEING FROM 0 VOLTS TO A MINIUM OF MINUS TWOTHIRDS OF THE POSITIVE PEAK VALUE, AND THE ALTERNATING CURRENT COMPONENT HAVING A FREQUENCY WITHIN THE LIMITS FROM ABOUT 25 CYCLES TO ABOUT 60 CYCLES.
Claim 2
Independent Claim
93 words
A METHOD OF ELECTRODEPOSITING BRIGHT PLATES OF METALS FROM ALKALINE BATHS WHICH COMPRISES PASSING A PLATING ELECTRIC CURRENT INCLUDING DIRECT AND ALTERNATING CURRENT COMPONENTS OF ABNORMAL ASYMMETRIC SINE WAVE FROM HAVING PEAKS AND VALLEYS THROUGH AN ALKALINE PLATING BATH OF A METAL FROM THE GROUP CONSISTING OF ZINC, CADMIUM, COPPER AND TIN, THE VALLEY VOLTAGE OF THE WAVE FORM BEING FROM 0 VOLTS TO A MINIUM OF MINUS TWOTHIRDS OF THE POSITIVE PEAK VALUE, AND THE ALTERNATING CURRENT COMPONENT HAVING A FREQUENCY WITHIN THE LIMITS FROM ABOUT 25 CYCLES TO ABOUT 60 CYCLES.
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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) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |