Patent US3096221A successfully refreshed from Google Patents.
US3096221A
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Method of quick nitrification in which fluidized particles are employed
Assignee: TO A KAKO KK
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Filing: 1960-01-04
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Granted: 1963-07-02
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Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 Tanaka Yukio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:41
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/60; C23C8/62; C23C8/06; C23C8/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD FOR THE QUICK NITRIFICATION OF A STEEL PIECE WHICH COMPRISES ESTABLISHING AND MAINTAINING A FLUIDIZED BED OF FINELY DIVIDED PARTICLES OF A SOLID NITRIFYING AGENT SUSPENED IN A GAS SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND AMMONIA, IMMERSING THE STEEL PIECE IN SAID FLUIDIZED BED BETWEEN ELECTRODES LIKEWISE IMMERSED IN SAID BED, AND PASSING PULSATING ELECTRIC CURRENT THROUGH THE PARTICELS FROM SAID ELECTRODES TO SAID STEEL PIECE UNDER SUCH CONDITIONS THAT THE PARTICLES ARE AT A POSITIVE POTENTIAL AND THE STEEL PIECE IS AT A NEGATIVE POTENTIAL WHEREBY SPARK DISCHARGES ARE GENERATED ON THE SURFACE OF THE STEEL PIECE, ATOMIC NITROGEN IS PRODUCED BY DECOMPOSING NITRIDING AGENT AT THE SURFACE AND IS IONIZED, AND THE IONIZED ATTOMIC NITROGEN PENETRATES THE SURFACE OF THE STEEL PIECE.
Claim 2
Independent Claim
128 words
A METHOD FOR THE QUICK NITRIFICATION OF A STEEL PIECE WHICH COMPRISES ESTABLISHING AND MAINTAINING A FLUIDIZED BED OF FINELY DIVIDED PARTICLES OF A SOLID NITRIFYING AGENT SUSPENED IN A GAS SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND AMMONIA, IMMERSING THE STEEL PIECE IN SAID FLUIDIZED BED BETWEEN ELECTRODES LIKEWISE IMMERSED IN SAID BED, AND PASSING PULSATING ELECTRIC CURRENT THROUGH THE PARTICELS FROM SAID ELECTRODES TO SAID STEEL PIECE UNDER SUCH CONDITIONS THAT THE PARTICLES ARE AT A POSITIVE POTENTIAL AND THE STEEL PIECE IS AT A NEGATIVE POTENTIAL WHEREBY SPARK DISCHARGES ARE GENERATED ON THE SURFACE OF THE STEEL PIECE, ATOMIC NITROGEN IS PRODUCED BY DECOMPOSING NITRIDING AGENT AT THE SURFACE AND IS IONIZED, AND THE IONIZED ATTOMIC NITROGEN PENETRATES THE SURFACE OF THE STEEL PIECE.
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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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |