US3303029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tin coating of copper surfaces by replacement plating
Assignee: Shipley Co Inc
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Filing: 1964-01-23
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Granted: 1967-02-07
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Expires: 1984-01-23
Abstract
No abstract record available.
Inventors
- 👤 Lucia H Shipley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:22
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; H; H05; H05K; H05K3/00; H05K3/22; H05K3/24; H05K3/244
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
THE METHOD OF FORMING AN ADHERENT TIN COATING ON A CUPREOUS SURFACE, SAID METHOD COMPRISING AS STEPS TREATING SAID SURFACE WITH AN AQUEOUS TIN SOLUTION FOR A TIME SUFFICIENT TO DEPOSIT THE DESIRED COATING THEREON, AND THEREAFTER REMOVING SAID SURFACE FROM THE SOLUTION, SAID SOLUTION CONTAINING A NON-OXIDIZING ACID SUFFICIENT TO PROVIDE A PH NOT GREATER THAN ABOUT 2.0, A DISSOLVED STANNOUS TIN SALT IN AN AMOUNT SUFFICIENT TO PROVIDE A USEFUL TIN DEPOSIT BUT NOT SUBSTANTIALLY EXCEEDING ABOUT 2.0 MOLS PER LITER, AT LEAST 2 MOLS OF THIOUREA PER MOL OF STANNOUS ION, AND A MATRERIAL SELECTED FROM THE GROUP CONSISTING OF HYPOPHOSPHOROUS ACID AND THE ALAKI METAL SALTS THEREOF.
References Cited (Backward Citations)
US2282511A
Cited
US2762723A
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US2883288A
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US2827398A
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US2829059A
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US2976180A
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US3046159A
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US2994369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |