US3085950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic etching of aluminum foil
Assignee: British Aluminum Co Ltd
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Filing: 1960-02-11
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Granted: 1963-04-16
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Expires: 1980-02-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas Robert William
- 👤 Young Reginald Searles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/055; C; C25; C25F; C25F3/00; C25F3/02; C25F3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR TREATING ALUMINIUM AND ALUMINIUM BASE ALLOYS TO INCREASE THE EFFECTIVE SURFACE THEREOF, COMPRISING ANODICALLY ELECTROYLTICALLY ETCHING THE METAL FOR FROM 2 MINUTES TO 15 MINUTES USING INTERRUPTED PULSES OF UNI-DIRECTIONAL CURRENT, WHEREIN THE PULSE DURATION IS FROM 5 TO 100 MICROSECONDS, THE PULSE REPETITION FREQUENCY IS IN THE RANGE OF 20 C.P.S. TO 6 K C.P.S., AND WHEREIN THE MEAN CURRENT DENSITY OVER EACH CURRENT PULSE IS FROM 3 TO 50 AMPS./SQ.CM., AND WHEREIN THE ELECTROLYTE COMPRISES AN AQUEOUS SOLUTION OF ONE OF THE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES, BROMIDES, IODIDES AND NITRATES OF SODIUM, POTASSIUM, MAGNSIUM AND AMMONIUM, AND THE ELECTROLYTE CONTAINS NOT LESS THAN 5 GRMS./LITRE OF ONE OF THE COMPOUNDS IN THE GROUP SPECIFIED, AND THE TEMPERATURE OF THE ELECTROLYTE IS NOT GREATER THAN 40*C.
Claim 2
Dependent Claim
135 words
A PROCESS FOR TREATING ALUMINIUM AND ALUMINIUM BASE ALLOYS TO INCREASE THE EFFECTIVE SURFACE THEREOF, COMPRISING ANODICALLY ELECTROYLTICALLY ETCHING THE METAL FOR FROM 2 MINUTES TO 15 MINUTES USING INTERRUPTED PULSES OF UNI-DIRECTIONAL CURRENT, WHEREIN THE PULSE DURATION IS FROM 5 TO 100 MICROSECONDS, THE PULSE REPETITION FREQUENCY IS IN THE RANGE OF 20 C.P.S. TO 6 K C.P.S., AND WHEREIN THE MEAN CURRENT DENSITY OVER EACH CURRENT PULSE IS FROM 3 TO 50 AMPS./SQ.CM., AND WHEREIN THE ELECTROLYTE COMPRISES AN AQUEOUS SOLUTION OF ONE OF THE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES, BROMIDES, IODIDES AND NITRATES OF SODIUM, POTASSIUM, MAGNSIUM AND AMMONIUM, AND THE ELECTROLYTE CONTAINS NOT LESS THAN 5 GRMS./LITRE OF ONE OF THE COMPOUNDS IN THE GROUP SPECIFIED, AND THE TEMPERATURE OF THE ELECTROLYTE IS NOT GREATER THAN 40*C.
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |