US3340109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treating quenching method and apparatus
Assignee: Multifastener Corp
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Filing: 1965-01-18
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Granted: 1967-09-05
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Expires: 1985-01-18
Abstract
No abstract record available.
Inventors
- 👤 William R Keough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:18
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/63; C21D1/64
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
IN A HEAT TREATMENT PROCESS WHEREIN ARTICLES TO BE TREATED ARE DISCHARGED FROM A HEAT TREATMENT FURNACE INTO A QUENCHING BATH FOLLOWING HEATING, THE STEPS OF DROPPING AN ARTICLE FROM THE FURNACE INTO A PREDETERMINED REGION HAVING INGRESS AND EGRESS PORTS FOR GRAVITATIONAL, SUBSTANTIALLY VERTICAL MOVEMENT THROUGH THE REGION, AND PROVIDING A SUBSTANTIALLY UPWARD VERTICAL FLOW OF BATH FLUID THROUGH THE EGRESS PORT IN A GENERALLY UPWARD DIRECTION COUNTERCURRENT TO THE DIRECTION OF MOVEMENT OF SAID ARTICLE TO (1) IMPINGE THE COUNTERCURRENT FLOW OF FLUID UPON THE ARTICLE, THEREBY QUICKENING THE RATE OF COOLING OF SAID ARTICLE AND (2) INHIBIT THE GRAVITATIONAL MOVEMENT OF THE ARTICLE THEREBY INCREASING THE RESIDENCE TIME OF THE ARTICLE IN SAID FLUID TO PRODUCE AN ARTICLE OF INCREASED HARDNESS.
References Cited (Backward Citations)
US2063784A
Cited
US3164656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |