US2786003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitriding of chromium steel
Assignee: Motors Liquidation Co
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Filing: 1954-01-11
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Granted: 1957-03-19
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Expires: 1974-01-11
Abstract
No abstract record available.
Inventors
- 👤 Teddy E Hollingsworth
- 👤 Robert C Matter
- 👤 Jr Oscar H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:46
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/24; C23C8/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A METHOD FOR NITRIDING CHROME STEEL IN A NEUTRAL ATMOSPHERE COMPRISING IN THE NEIGHBORHOOD OF ABOUT 10% HYTROGEN AND 90% NITROGEN AT A TEMPERATURE OF 1750* F.TO 1850* F., THAT STEP OF ADDING TO THE ATMOSPHERE CARBON MONOXIDE IN QUANTITIES OF FROM .1 TO LESS THAN .4 OF A CUBIC FOOT PER 500 CUBIC FEET OF ATMOSPHERE WHEREBY THE EXTENT OF NITRIDING IS CONTROLLED INVERSELY AS THE QUANTITY OF CARBON MONOXIDE INCREASES.
Claim 2
Dependent Claim
73 words
IN A METHOD FOR NITRIDING CHROME STEEL IN A NEUTRAL ATMOSPHERE COMPRISING IN THE NEIGHBORHOOD OF ABOUT 10% HYTROGEN AND 90% NITROGEN AT A TEMPERATURE OF 1750* F.TO 1850* F., THAT STEP OF ADDING TO THE ATMOSPHERE CARBON MONOXIDE IN QUANTITIES OF FROM .1 TO LESS THAN .4 OF A CUBIC FOOT PER 500 CUBIC FEET OF ATMOSPHERE WHEREBY THE EXTENT OF NITRIDING IS CONTROLLED INVERSELY AS THE QUANTITY OF CARBON MONOXIDE INCREASES.
References Cited (Backward Citations)
US2340461A
Cited
US2703298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |