US3013956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of etching metals in the platinum group and producing printed circuits therefrom
Assignee: BALDWIN PIANO Co
•
Filing: 1957-04-05
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Granted: 1961-12-19
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Frances B Hugle
- 👤 William B Hugle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:47
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/07; C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/30; C25; C25F; C25F3/00; C25F3/02; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/191; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49156
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF ETCHING A PATTERN IN A BODY OF METAL IN THE PLATINUM GROUP COMPRISING THE STEPS OF CONTACTING THE BODY WITH A MASS OF METAL FROM THE GROUP CONSISTING OF LEAD, LEAD-TIN, IRON AND CADMIUM, PLACING A LAYER OF RESIST IN THE DESIRED PATTERN ON THE BODY, AND PLACING THE RESIST, BODY, AND AT LEAST A PORTION OF THE METAL MASS IN CONTACT WITH AN ELECTROLYTE CONSISTING ESSENTIALLY OF A HYDROHALIC ACID, THE CONTACT POTENTIAL OF THE MASS AND BODY MAKING THE BODY ELECTRICALLY NEGATIVE WITH RESPECT TO THE ELECTROLYTE.
Claim 2
Independent Claim
92 words
THE METHOD OF ETCHING A PATTERN IN A BODY OF METAL IN THE PLATINUM GROUP COMPRISING THE STEPS OF CONTACTING THE BODY WITH A MASS OF METAL FROM THE GROUP CONSISTING OF LEAD, LEAD-TIN, IRON AND CADMIUM, PLACING A LAYER OF RESIST IN THE DESIRED PATTERN ON THE BODY, AND PLACING THE RESIST, BODY, AND AT LEAST A PORTION OF THE METAL MASS IN CONTACT WITH AN ELECTROLYTE CONSISTING ESSENTIALLY OF A HYDROHALIC ACID, THE CONTACT POTENTIAL OF THE MASS AND BODY MAKING THE BODY ELECTRICALLY NEGATIVE WITH RESPECT TO THE ELECTROLYTE.
References Cited (Backward Citations)
US1779457A
Cited
US2057272A
Cited
US2370871A
Cited
US2421607A
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US2758074A
Cited
US2702252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |