US2962391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of chromizing
Assignee: Individual
•
Filing: 1959-03-16
•
Granted: 1960-11-29
•
Expires: 1979-03-16
Abstract
No abstract record available.
Inventors
- 👤 George A Samuel
- 👤 Bell Jerome Victor
- 👤 Jackson Joseph Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:37
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/36; C23C10/38; C23C10/40; C23C10/42; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE PROCESS OF CHROMIZING FERROUS METAL ARTICLES, WHICH COMPRISES PLACING THE ARTICLES IN A CLOSED SPACE CONTAINING CHROMIUM AND BETWEEN 0.1 AND 2 PERCENT OF HYDRAZINE HYDROHALIDE ON THE WEIGHT OF THE CHARGE AND HEATING THE ARTICLES, THE CHROMIUM AND THE HYDRAZINE HYDROHALIDE TO A TEMPERATURE OF 1600 TO 2300*F. WHILE SURROUNDING THE ARTICLES BY A GAS ATMOSPHERE EVOLVED FROM THE HYDRAZINE HYDROHALIDE AND MAINTAINING THE ARTICLES AT A TEMPERATURE WITHIN THE TEMPERATURE RANGE SET FORTH FOR A TIME OF AT LEAST 30 MINUTES.
Claim 2
Dependent Claim
84 words
THE PROCESS OF CHROMIZING FERROUS METAL ARTICLES, WHICH COMPRISES PLACING THE ARTICLES IN A CLOSED SPACE CONTAINING CHROMIUM AND BETWEEN 0.1 AND 2 PERCENT OF HYDRAZINE HYDROHALIDE ON THE WEIGHT OF THE CHARGE AND HEATING THE ARTICLES, THE CHROMIUM AND THE HYDRAZINE HYDROHALIDE TO A TEMPERATURE OF 1600 TO 2300*F. WHILE SURROUNDING THE ARTICLES BY A GAS ATMOSPHERE EVOLVED FROM THE HYDRAZINE HYDROHALIDE AND MAINTAINING THE ARTICLES AT A TEMPERATURE WITHIN THE TEMPERATURE RANGE SET FORTH FOR A TIME OF AT LEAST 30 MINUTES.
References Cited (Backward Citations)
GB722797A
Cited
US2930106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |