US3222228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of boronizing steel
Assignee: Crucible Steel Company of America
•
Filing: 1962-06-28
•
Granted: 1965-12-07
•
Expires: 1982-06-28
Abstract
No abstract record available.
Inventors
- 👤 Stanley James Korynta
- 👤 Jr William Howard Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/60; C23C8/62; C23C8/68; C23C8/70; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF COMBINED CONTROLLED BORONIZING AND ANNEALING OF FERROUS METAL SHEET STOCK COMPRISING APPLYING TO THE SURFACE OF THE STOCK A SLURRY COMPRISING A VOLATILIZABLE VEHICLE AND A FUSED MIXTURE OF MAGNESIUM OXIDE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BORON OXIDES, BORATES OF SODIUM, LITHIUM, POTASSIUM, AND MAGNESIUM, AND MIXTURES THEREOF, HEATING THE COATED STOCK TO VOLATILIZE THE VEHICLE AND CONTINUING SAID HEATING IN DRY HYDROGEN AT A TEMPERATURE BETWEEN ABOUT 1900*F. AND 2100*F. FOR A PERIOD FROM ABOUT 0.5 TO ABOUT 2 HOURS TO ANNEAL THE STOCK AND TO EFFECT IMPREGNATON OF THE STOCK WITH BORON TO A DESIRED EXTENT.
Claim 2
Independent Claim
105 words
A METHOD OF COMBINED CONTROLLED BORONIZING AND ANNEALING OF FERROUS METAL SHEET STOCK COMPRISING APPLYING TO THE SURFACE OF THE STOCK A SLURRY COMPRISING A VOLATILIZABLE VEHICLE AND A FUSED MIXTURE OF MAGNESIUM OXIDE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BORON OXIDES, BORATES OF SODIUM, LITHIUM, POTASSIUM, AND MAGNESIUM, AND MIXTURES THEREOF, HEATING THE COATED STOCK TO VOLATILIZE THE VEHICLE AND CONTINUING SAID HEATING IN DRY HYDROGEN AT A TEMPERATURE BETWEEN ABOUT 1900*F. AND 2100*F. FOR A PERIOD FROM ABOUT 0.5 TO ABOUT 2 HOURS TO ANNEAL THE STOCK AND TO EFFECT IMPREGNATON OF THE STOCK WITH BORON TO A DESIRED EXTENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |