US3202553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of heat treating articles
Assignee: Individual
•
Filing: 1960-12-19
•
Granted: 1965-08-24
•
Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 Greene Ben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:47
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF HEAT-TREATNG ARTICLES IN WHICH THE ARTICLES, AFTER BEING HEATED BY DIRECT EXPOSURE TO HEATING MEANS WITHIN A FURNACE CHAMBER, ARE COOLED WHILE STILL IN THE FURNACE CHAMBER BY CIRCULATION THROUGH THE FURNACE CHAMBER OF A COOLING GAS MADE UP OF ANY OF THE GASES HYDROGEN, HELIUM, NITROGEN ARGON AT A PRESSURE ABOVE THIRTY POUNDS PER SQUARE INCH ABSOLUTE.
Claim 2
Independent Claim
61 words
A METHOD OF HEAT-TREATNG ARTICLES IN WHICH THE ARTICLES, AFTER BEING HEATED BY DIRECT EXPOSURE TO HEATING MEANS WITHIN A FURNACE CHAMBER, ARE COOLED WHILE STILL IN THE FURNACE CHAMBER BY CIRCULATION THROUGH THE FURNACE CHAMBER OF A COOLING GAS MADE UP OF ANY OF THE GASES HYDROGEN, HELIUM, NITROGEN ARGON AT A PRESSURE ABOVE THIRTY POUNDS PER SQUARE INCH ABSOLUTE.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |