Patent US2564906A successfully refreshed from Google Patents.
US2564906A
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Heat-treatment of irregular metallic objects
Assignee: Westinghouse Electric Corp
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Filing: 1947-07-09
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Granted: 1951-08-21
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Expires: 1967-07-09
Abstract
No abstract record available.
Inventors
- 👤 Homer F Kincaid
- 👤 John D Graham
- 👤 Robert M Baker
- 👤 Edward M Wharff
- 👤 John A Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:36
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/06; C21D1/09; C21D1/10; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
THE MASS PRODUCTION METHOD OF HEAT TREATING METALLIC ARTICLES WHICH ARE HARDENABLE BY HEATING AND QUENCHING, SAID ARTICLES HAVING AN IRREGULAR PERIPHERA SURFACE, WHICH COMPRISES THE STEPS OF PRE-HEATING EACH OF SAID ARTICLES WITH A RELATIVELY LOW FREQUENCY CURRENT IN A PLURALITY OF DISCRETE IMPLUSES OF SUBSTANTIALLY EQUAL PREDETERMINED TIME DURATIONS AT SUBSTANTIALLY EQUAL PREDETERMINED TIME INTERVALS, THEREBY HEATING EACH OF SAID ARTICLES TO A TEMPERATURE OF THE ORDER
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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) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |