US2933386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sintering and nitriding ferrous bodies
Assignee: RCA Corp
•
Filing: 1956-08-01
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Granted: 1960-04-19
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Expires: 1976-08-01
Abstract
No abstract record available.
Inventors
- 👤 Pessel Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:10
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/24; C23C8/26; C22; C22C; C22C33/00; C22C33/02; B; B22; B22F; B22F2999/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD OR PROCESSING A PRESSED POWDER BODY CONSISTING ESSENTIALLY OF IRON COMPRISING THE STEPS OF: PARTIALLY SINTERING SAID BODY AT A TEMPERATURE OF ABOUT 1800*F. TO ABOUT 2100*F. IN A NON-OXIDIZING ATMOSPHERE, THEN, WHILE CONTINUINMG SAID SINTERING, NITRIDING THE SURFACE OF SAID BODY IN AN ATMOSPHERE CONTAINING MONATOMIC NITROGEN AT SUBSTANTIALLY THE SAME TEMPERATURE FOR A BRIEF PERIOD.
Claim 2
Independent Claim
59 words
THE METHOD OR PROCESSING A PRESSED POWDER BODY CONSISTING ESSENTIALLY OF IRON COMPRISING THE STEPS OF: PARTIALLY SINTERING SAID BODY AT A TEMPERATURE OF ABOUT 1800*F. TO ABOUT 2100*F. IN A NON-OXIDIZING ATMOSPHERE, THEN, WHILE CONTINUINMG SAID SINTERING, NITRIDING THE SURFACE OF SAID BODY IN AN ATMOSPHERE CONTAINING MONATOMIC NITROGEN AT SUBSTANTIALLY THE SAME TEMPERATURE FOR A BRIEF PERIOD.
References Cited (Backward Citations)
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Cited
US1989186A
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US2051454A
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US2333573A
Cited
US2666724A
Cited
FR1107756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |