US2493768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of lead coating
Assignee: HORACE C KNERR
•
Filing: 1944-06-21
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Granted: 1950-01-10
•
Expires: 1964-06-21
Abstract
No abstract record available.
Inventors
- 👤 Magnin Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:14
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
THE METHOD OF COATING A METAL COLD WORKING BLANK PREPARATORY TO COLD WORKING WITH AT LEAST COMMERCIALLY PURE LEAD FOR LUBRICATING BY THE COATING DURING COLD WORKING, WHICH COMPRISES FORMING A BATH OF AT LEAST COMMERCIALLY PURE MOLTEN LEAD, FLOATING UPON THE MOLTEN LEAD A FLUX COMPRISING A METALLIC SALT WHICH IS FUSIBLE AND RELATIVELY STABLE AT A TEMPERATURE CORRESPONDING SUBSTANTIALLY WITH THAT OF THE MOLTEN LEAD, THE SALT BEING SELECTED FROM THE GROUP CONSISTING OF ACETATES, BORATES, CHLORIDES AND SULPHATES OF THE METALS ANTIMONY, BISMUTH, CADMIUM AND TIN, AND AT LEAST TWO CHLORIDES OF THE CLASS CONSISTING OF ZINC, SODIUM AND AMMONIUM CHLORIDE, PASSING THE METAL COLD WORKING BLANK TO BE COATED REPEATEDLY BACK AND FORTH ACROSS THE FLUX-MOLTEN LEAD INTERFACE INTO THE MOLTEN LEAD, AND WITHDRAWING THE METAL COLD WORKING BLANK COATED FROM THE MOLTEN 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) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |