US2870903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal drawing lubricant
Assignee: Diamond Shamrock Corp
•
Filing: 1955-04-08
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Granted: 1959-01-27
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Expires: 1975-04-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph Adrien M Leduc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:18
CPC Classifications
B; B21; B21C; B21C9/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
62 words
A METAL TREATING PROCESS COMPRISING THE STEPS OF SUCCESSIVELY IMMERSING THE METAL IN MOLTEN ALKALI METAL HYDROXIDE, IMMERSING SAID METAL IN A MOLTEN FATTY SUBSTANCE WHICH REACTS WITH SAID HYDROXIDE IN SITU TO FORM A LUBRICANT LAYER, AND SUBSEQUENTLY SUBJECTING THE THUSTREATED METAL TO HEATING AT AN ELEVATED TEMPERATURE SUFFICIENT TO REMOVE AXCESS UNREACTED MOLTEN FATTLY SUBSTANCE WITHOUT REMOVING SAID LUBRICANT LAYER.
Claim 2
Dependent Claim
62 words
A METAL TREATING PROCESS COMPRISING THE STEPS OF SUCCESSIVELY IMMERSING THE METAL IN MOLTEN ALKALI METAL HYDROXIDE, IMMERSING SAID METAL IN A MOLTEN FATTY SUBSTANCE WHICH REACTS WITH SAID HYDROXIDE IN SITU TO FORM A LUBRICANT LAYER, AND SUBSEQUENTLY SUBJECTING THE THUSTREATED METAL TO HEATING AT AN ELEVATED TEMPERATURE SUFFICIENT TO REMOVE AXCESS UNREACTED MOLTEN FATTLY SUBSTANCE WITHOUT REMOVING SAID LUBRICANT LAYER.
Claim 3
Dependent Claim
20 words
THE PROCESS OF CLAIM 1 WHEREIN SAID METAL IS SUBJECTED TO DRAWING FOLLOWING REMOVAL OF THE EXCESS MOLTEN FATTY SUBSTANCE.
References Cited (Backward Citations)
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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) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |