US2565201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled atmosphere for heattreating metals
Assignee: Airco Inc
•
Filing: 1947-09-26
•
Granted: 1951-08-21
•
Expires: 1967-09-26
Abstract
No abstract record available.
Inventors
- 👤 Haim H Chiswik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:03
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN THE METHOD OF ANNEALING STEEL OF A PREDETERMINED CARBON CONTENT IN WHICH THE STELL IS HEATED AT A PREDETERMINED TEMPERATURE WHILE IN CONTACT WITH A GAS CONTAINING N2, AND CO AND CO2 IN A DESIRED PREDETERMINED RATIO; THE IMPROVEMENT IN FORMING SAID GAS WHICH COMPRISES SELECTIVELY ABSORBING FROM A PORTION OF A GAS CONTAINING N2, AND CO AND CO2 IN A RATIO OTHER THAN THE DESIRED PREDETERMINED RATIO THE CARBONOXYGEN CONSTITUENT WHICH IS PRESENT IN EXCESS OF THE DESIRED RATIO AND MIXING THE GAS DEPLETED IN SAID CONSTITUENT WITH THE REMAINDER OF THE GAS, THE AMOUNT OF SAID CONSTITUENT WHICH IS SELECTIVELY ABSORBED BEING SUCH THAT THE GAS RESULTING FROM SAID MIXING WILL CONTAIN CO AND CO2 IN THE DESIRED PREDETERMINED RATIO.
Claim 2
Dependent Claim
123 words
IN THE METHOD OF ANNEALING STEEL OF A PREDETERMINED CARBON CONTENT IN WHICH THE STELL IS HEATED AT A PREDETERMINED TEMPERATURE WHILE IN CONTACT WITH A GAS CONTAINING N2, AND CO AND CO2 IN A DESIRED PREDETERMINED RATIO; THE IMPROVEMENT IN FORMING SAID GAS WHICH COMPRISES SELECTIVELY ABSORBING FROM A PORTION OF A GAS CONTAINING N2, AND CO AND CO2 IN A RATIO OTHER THAN THE DESIRED PREDETERMINED RATIO THE CARBONOXYGEN CONSTITUENT WHICH IS PRESENT IN EXCESS OF THE DESIRED RATIO AND MIXING THE GAS DEPLETED IN SAID CONSTITUENT WITH THE REMAINDER OF THE GAS, THE AMOUNT OF SAID CONSTITUENT WHICH IS SELECTIVELY ABSORBED BEING SUCH THAT THE GAS RESULTING FROM SAID MIXING WILL CONTAIN CO AND CO2 IN THE DESIRED PREDETERMINED RATIO.
References Cited (Backward Citations)
US409276A
Cited
US2085597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |