Patent US3220893A successfully refreshed from Google Patents.
US3220893A
Expired / Lapsed
US
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Metal quenching medium
Assignee: Union Carbide Corp
•
Filing: 1963-11-29
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Granted: 1965-11-30
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Blackwood Robert Ross
- 👤 Cheesman William David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/56; C21D1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A METHOD FOR QUENCHING HEATED METAL WHICH COMPRISES CONTACTING SAID HEATED METAL WITH A LIQUID QUENCHING MEDIUM CONSISTING PRINCIPALLY OF WATER HAVING DISSOVLED THEREIN A LIQUID WATER-SOLUBLE OXYALKYLENE POLYMER, SAID OXYALKYLENE POLYMER BEING CHARACTERIZED BY THE PRESENCE OF BOTH OXYETHYLENE GROUPS AND HIGHER OXYALKYLENE GROUPS.
Claim 2
Independent Claim
45 words
A METHOD FOR QUENCHING HEATED METAL WHICH COMPRISES CONTACTING SAID HEATED METAL WITH A LIQUID QUENCHING MEDIUM CONSISTING PRINCIPALLY OF WATER HAVING DISSOVLED THEREIN A LIQUID WATER-SOLUBLE OXYALKYLENE POLYMER, SAID OXYALKYLENE POLYMER BEING CHARACTERIZED BY THE PRESENCE OF BOTH OXYETHYLENE GROUPS AND HIGHER OXYALKYLENE GROUPS.
References Cited (Backward Citations)
US2770564A
Cited
US3022205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |