US2600290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for quench-hardening steel
Assignee: EIDP Inc
•
Filing: 1950-08-08
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Granted: 1952-06-10
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Expires: 1970-08-08
Abstract
No abstract record available.
Inventors
- 👤 Ernest R Corneil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:55
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/56; C21D1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
THE PROCESS FOR HEAT TREATING STEEL COMPRISING HEATING THE STEEL TO A QUENCH HARDENING TEMPERATURE AND THEREAFTER QUENCHING SAID STEEL BY IMMERSION IN AN AQUEOUS LIQUID CONTAINING 0.1 TO 10% BY WEIGHT OF A POLYVINYL RESIN.
Claim 2
Dependent Claim
36 words
THE PROCESS FOR HEAT TREATING STEEL COMPRISING HEATING THE STEEL TO A QUENCH HARDENING TEMPERATURE AND THEREAFTER QUENCHING SAID STEEL BY IMMERSION IN AN AQUEOUS LIQUID CONTAINING 0.1 TO 10% BY WEIGHT OF A POLYVINYL RESIN.
References Cited (Backward Citations)
US2215278A
Cited
US2362397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |