US2864731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming protective films on metal
Assignee: Individual
•
Filing: 1956-07-13
•
Granted: 1958-12-16
•
Expires: 1976-07-13
Abstract
No abstract record available.
Inventors
- 👤 David H Gurinsky
- 👤 Otto F Kammerer
- 👤 Sadofsky Jerome
- 👤 John R Weeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
C; C23; C23F; C23F11/00; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22; G; G21; G21C; G21C15/00; G21C15/28; G21C17/00; G21C17/02; G21C17/022; G21C17/0225; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S62/00; Y10S62/20; Y10T; Y10T428/00; Y10T428/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
60 words
THE METHOD OF INHIBITING THE CORROSION OF FERROUS METAL SURFACES BY HEAVY LIQUID METALS AT TEMPERATURES ABOVE 500*C. WHICH BRINGING ZIRCONIUM AND NITROGEN INTO REACTIVE CONTACT TO FORM ON SAID METAL SURFACE AN ADHERENT LAYER OF ZIRCONIUM NITRIDE HAVING A THICKNESS OF AT LEAST 0.5 MICRON AND THEREAFTER MAINTAINING ZIRCONIUM DISSOLVED IN THE HEAVY LIQUID METAL CONTACTING SAID METAL SURFACE.
Claim 2
Independent Claim
60 words
THE METHOD OF INHIBITING THE CORROSION OF FERROUS METAL SURFACES BY HEAVY LIQUID METALS AT TEMPERATURES ABOVE 500*C. WHICH BRINGING ZIRCONIUM AND NITROGEN INTO REACTIVE CONTACT TO FORM ON SAID METAL SURFACE AN ADHERENT LAYER OF ZIRCONIUM NITRIDE HAVING A THICKNESS OF AT LEAST 0.5 MICRON AND THEREAFTER MAINTAINING ZIRCONIUM DISSOLVED IN THE HEAVY LIQUID METAL CONTACTING SAID METAL SURFACE.
Claim 3
Independent Claim
87 words
THE METHOD OF FORMING AN ADHERENT LAYER OF A NITRIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM AND HAFNIUM ON THE SURFACE OF A HIGH MELTING STRUCTURAL METAL WHICH COMPRISES INTRODUCING INTO THE METAL TO BE PROTECTED A CONCENTRATION OF NITROGEN HIGHER THAN THE NORMAL CONCENTRATION OF NITROGEN IN SAID STRUCTURAL METAL AND THEREAFTER CONTACTING SAID SURFACE WITH A LIQUID METAL CARRYING MEDIUM CONTAINING THE SELECTED METAL DISSOLVED THEREIN AT A TEMPERATURE AT WHICH THE NITROGEN IS AVAILABLE FOR REACTION AT SAID SURFACE.
Claim 4
Independent Claim
87 words
THE METHOD OF FORMING AN ADHERENT LAYER OF A NITRIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM AND HAFNIUM ON THE SURFACE OF A HIGH MELTING STRUCTURAL METAL WHICH COMPRISES INTRODUCING INTO THE METAL TO BE PROTECTED A CONCENTRATION OF NITROGEN HIGHER THAN THE NORMAL CONCENTRATION OF NITROGEN IN SAID STRUCTURAL METAL AND THEREAFTER CONTACTING SAID SURFACE WITH A LIQUID METAL CARRYING MEDIUM CONTAINING THE SELECTED METAL DISSOLVED THEREIN AT A TEMPERATURE AT WHICH THE NITROGEN IS AVAILABLE FOR REACTION AT SAID SURFACE.
References Cited (Backward Citations)
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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) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |