US2899346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast iron heat
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:22
CPC Classifications
C; C21; C21D; C21D5/00; C21D1/00; C21D1/18; C22; C22C; C22C38/00; C22C38/04; C21D2211/00; C21D2211/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD OF HEAT TREATING WHITE ION CASTING WHICH COMPRISES SUBJECTING A CASTING OF SAID WHITE ION TO AUSTENIZATION WITH HEAT AT A TEMPERATURE OF APPROXIMATELY 840*C., COOLING THE CASTING IN STILL AIR SUFFICEINTLY FOR THE SURFACE TEMPERATURE OF THE CASTING TO COOL TO A TEMPERATUARE IN THE ORDER OF 650*C. TO 700*C., QUENCHING THE CASTING TO FORM MARTENSITE, SUBJECTING THE CASTING TO NUCLEATION TEMPERATURE WITH HEAT AT A TEMPERATURE IN THE ORDER OF 450*C., SUBJECTING THE CASTING TO GRAPHITIZATION WITH HEAT AT A TEMPERATURE BETWEEN 800*C. TO 950*C. FOR A PERIOD OF TIME IN THE ORDER OF TWO HOURS.
Claim 2
Independent Claim
100 words
A METHOD OF HEAT TREATING WHITE ION CASTING WHICH COMPRISES SUBJECTING A CASTING OF SAID WHITE ION TO AUSTENIZATION WITH HEAT AT A TEMPERATURE OF APPROXIMATELY 840*C., COOLING THE CASTING IN STILL AIR SUFFICEINTLY FOR THE SURFACE TEMPERATURE OF THE CASTING TO COOL TO A TEMPERATUARE IN THE ORDER OF 650*C. TO 700*C., QUENCHING THE CASTING TO FORM MARTENSITE, SUBJECTING THE CASTING TO NUCLEATION TEMPERATURE WITH HEAT AT A TEMPERATURE IN THE ORDER OF 450*C., SUBJECTING THE CASTING TO GRAPHITIZATION WITH HEAT AT A TEMPERATURE BETWEEN 800*C. TO 950*C. FOR A PERIOD OF TIME IN THE ORDER OF TWO HOURS.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |