US2741586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating metals
Assignee: North American Aviation Corp
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Filing: 1953-01-12
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Granted: 1956-04-10
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Expires: 1973-01-12
Abstract
No abstract record available.
Inventors
- 👤 Bert J Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:17
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
68 words
A METHOD FOR ELECTORPLATING UNIFORM DEPOSITS OF MATERIAL UPON AN ELECTRODE IN A PLATING SOLUTION WHICH CONSISTS OF PASSING AN ALTERNATING PLATING CURRENT OF ASYMMETRIC SINE WAVE FORM THROUGH SAID PLATING SOLUTION, THE POSITIVE PLATING HALF CYCLE BEING GREATER THAN THE NEGATIVE DE-PLATING HALF-CYCLE OF SAID CURRENT IN AMPLITUDE AND BEING EQUAL IN TIME DURATION, WHEREBY SAID METAL IS PLATED IN A BRIGHT DEPOSIT UPON A BASE METAL.
Claim 2
Independent Claim
68 words
A METHOD FOR ELECTORPLATING UNIFORM DEPOSITS OF MATERIAL UPON AN ELECTRODE IN A PLATING SOLUTION WHICH CONSISTS OF PASSING AN ALTERNATING PLATING CURRENT OF ASYMMETRIC SINE WAVE FORM THROUGH SAID PLATING SOLUTION, THE POSITIVE PLATING HALF CYCLE BEING GREATER THAN THE NEGATIVE DE-PLATING HALF-CYCLE OF SAID CURRENT IN AMPLITUDE AND BEING EQUAL IN TIME DURATION, WHEREBY SAID METAL IS PLATED IN A BRIGHT DEPOSIT UPON A BASE METAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |