US2895816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel grit and method for manufacturing same
Assignee: Individual
•
Filing: 1955-06-16
•
Granted: 1959-07-21
•
Expires: 1975-06-16
Abstract
No abstract record available.
Inventors
- 👤 Chalmer R Cline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:06
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0068; B; B22; B22F; B22F1/00; B22F1/14; B22F1/142; B22F9/00; B22F2998/00; C21D2211/00; C21D2211/008; C21D7/00; C21D7/02; C21D7/04; C21D7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
FOR USE WITH CENTRIFUGAL BLASTING WHEELS IN THE TREATING OF METAL SURFACES, CRUSHED STEEL SHOT CONSISTING OF STEEL GRIT OF SMALL DIMENSION AND IRREGULAR SHAPE HAVING RELATIVEELY ABRUPT EDGEES AND A HARDNESS WITHIN THE RANGE OF 35 TO 64 ROCKWELL C IN WHICH THE STEEL IS A MARTENSITIC STEEL CONVERTED BY HEAT TREATMENT FROM AN AUSTENITIC STEEL SHOT HAVING FROM 1.00-1.50 PERCEENT BY WEIGHT CARBON, 0.40-0.90 PERCEENT BY WEIGHT SILICON, AND A HARDENING ELEMENT SELECTED FROM THE GROUP CONSISTING OF 1.00-1.50 PERCENT BY WEIGHT MANGANESE, 0.50-5.0 PERCENT BY WEIGHT CHROMIUM, 0.30-5.0 PERCENT BY WEIGHT MOLYBDENUM, 0.05-0.40 PERCENT BY WEIGHTT VANADIUM, 0.50-2.5 PERCENT BY WEIGHT NICKEL, 0.20-1.00 PERCENT BY WEIGHT COPPER AND MIXTURES THEREOF, THE REMAINDER BEING IRON PLUS SMALL AMOUNTS OF IMPURITIES.
Claim 2
Dependent Claim
122 words
FOR USE WITH CENTRIFUGAL BLASTING WHEELS IN THE TREATING OF METAL SURFACES, CRUSHED STEEL SHOT CONSISTING OF STEEL GRIT OF SMALL DIMENSION AND IRREGULAR SHAPE HAVING RELATIVEELY ABRUPT EDGEES AND A HARDNESS WITHIN THE RANGE OF 35 TO 64 ROCKWELL C IN WHICH THE STEEL IS A MARTENSITIC STEEL CONVERTED BY HEAT TREATMENT FROM AN AUSTENITIC STEEL SHOT HAVING FROM 1.00-1.50 PERCEENT BY WEIGHT CARBON, 0.40-0.90 PERCEENT BY WEIGHT SILICON, AND A HARDENING ELEMENT SELECTED FROM THE GROUP CONSISTING OF 1.00-1.50 PERCENT BY WEIGHT MANGANESE, 0.50-5.0 PERCENT BY WEIGHT CHROMIUM, 0.30-5.0 PERCENT BY WEIGHT MOLYBDENUM, 0.05-0.40 PERCENT BY WEIGHTT VANADIUM, 0.50-2.5 PERCENT BY WEIGHT NICKEL, 0.20-1.00 PERCENT BY WEIGHT COPPER AND MIXTURES THEREOF, THE REMAINDER BEING IRON PLUS SMALL AMOUNTS OF IMPURITIES.
References Cited (Backward Citations)
US686839A
Cited
US1751340A
Cited
US1739068A
Cited
US2145757A
Cited
US2258566A
Cited
US2299639A
Cited
US2336001A
Cited
US2362310A
Cited
GB687969A
Cited
US2670281A
Cited
GB667016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |