Patent US2921865A successfully refreshed from Google Patents.
US2921865A
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Method of forming cold extrusion lubricants having a zinc phosphate undercoating
Assignee: Aluminum Res Corp
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Filing: 1958-04-02
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Granted: 1960-01-19
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Expires: 1978-04-02
Abstract
No abstract record available.
Inventors
- 👤 William L Kubie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:19
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A METHOD FOR APPLYING A LUBRICANT TO A METAL BILLET PRIOR TO THE COLD EXTRUSION THEREOF, THE STEPS COMPRISING , APPLYING A UNIFORM COATING OF ZINC PHOSPHATE TO SAID BILLET, PLACING THE COATED BILLET IN A LUBRICATING BATH COMPRISING AN AQUEOUS MIXTURE OF A WATER SOLUBLE SALT OF STERIC ACID AND FREE STEARIC ACID WHEREIN THE ZINC PHOSPHATE COATING IS CONVERTED TO A LUBRICANT COATING INCLUDING ZINC STEARATE, AND MAINTAINING THE FREE STEARIC ACID CONCENTRATION OF THE LUBRICATING BATH AT A LEVEL SUCH THAT 10 ML. OF THE BATH IS NEUTRALIZED BY 0.6 TO 0.8 ML. OF 0.10 N SODIUM HYDROXIDE BY THE ADDITION OF STEARIC ACID.
Claim 2
Dependent Claim
108 words
IN A METHOD FOR APPLYING A LUBRICANT TO A METAL BILLET PRIOR TO THE COLD EXTRUSION THEREOF, THE STEPS COMPRISING , APPLYING A UNIFORM COATING OF ZINC PHOSPHATE TO SAID BILLET, PLACING THE COATED BILLET IN A LUBRICATING BATH COMPRISING AN AQUEOUS MIXTURE OF A WATER SOLUBLE SALT OF STERIC ACID AND FREE STEARIC ACID WHEREIN THE ZINC PHOSPHATE COATING IS CONVERTED TO A LUBRICANT COATING INCLUDING ZINC STEARATE, AND MAINTAINING THE FREE STEARIC ACID CONCENTRATION OF THE LUBRICATING BATH AT A LEVEL SUCH THAT 10 ML. OF THE BATH IS NEUTRALIZED BY 0.6 TO 0.8 ML. OF 0.10 N SODIUM HYDROXIDE BY THE ADDITION OF STEARIC ACID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |