US2643975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of lead coating a ferrous article
Assignee: United States Steel Corp
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Filing: 1949-06-22
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Granted: 1953-06-30
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Expires: 1969-06-22
Abstract
No abstract record available.
Inventors
- 👤 Richard A Neish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:54
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/10; C23C2/003; C23C2/0038; C23C2/02; C23C2/022; C23C2/024; C23C2/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF APPLYING AN ADHERENT COATING OF SUBSTANTIALLY PURE LEAD TO A FERROUS METAL ARTIOLE WHICH CONSISTS OF ELECTROPLATING THE ARTICLE WITH A TIN COATING BETWEEN 0.000003 AND 0.000018 INCH IN THICKNESS, HEATING THE TIN PLATED ARTICLE TO A TEMPERATURE BETWEEN THE MELTING POINT OF TIN AND 650* F. TO SUBSTANTIALLY COMPLETELY ALLOY SAID TIN WITH THE SURFACE OF SAID ARTICLE, AND THEN IMMERSING THE HEATED ARTICLE IN A MOLTEN BATH OF LEAD.
Claim 2
Independent Claim
74 words
THE METHOD OF APPLYING AN ADHERENT COATING OF SUBSTANTIALLY PURE LEAD TO A FERROUS METAL ARTIOLE WHICH CONSISTS OF ELECTROPLATING THE ARTICLE WITH A TIN COATING BETWEEN 0.000003 AND 0.000018 INCH IN THICKNESS, HEATING THE TIN PLATED ARTICLE TO A TEMPERATURE BETWEEN THE MELTING POINT OF TIN AND 650* F. TO SUBSTANTIALLY COMPLETELY ALLOY SAID TIN WITH THE SURFACE OF SAID ARTICLE, AND THEN IMMERSING THE HEATED ARTICLE IN A MOLTEN BATH OF LEAD.
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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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |