Patent US3918286A successfully refreshed from Google Patents.
Patent US2723927A successfully refreshed from Google Patents.
US2723927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of scale free flame heating of metals
Assignee: Harmon and Co
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Filing: 1953-10-20
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Granted: 1955-11-15
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Expires: 1973-10-20
Abstract
No abstract record available.
Inventors
- 👤 Tour Sam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:11
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE METHOD OF INHIBITING OXIDATION IN THE HEATING OF SOLID MASSES OF IRON AND STEEL IN DIRECT CONTACT WITH GASEOUS PRODUCTS OF COMBUSTION IN A FURNACE, WHICH COMPRISES INTRODUCING INTO SUCH A FURNACE WITH THE GASEOUS PRODUCTS OF COMBUSTION, A VOLATILE COMPOUND OF BORON TO THE EXTENT OF AT LEAST 1/20 POUND OF BORON FOR EACH MILLION B. T. U.''S OF HEAT INTRODUCED.
Claim 2
Independent Claim
63 words
THE METHOD OF INHIBITING OXIDATION IN THE HEATING OF SOLID MASSES OF IRON AND STEEL IN DIRECT CONTACT WITH GASEOUS PRODUCTS OF COMBUSTION IN A FURNACE, WHICH COMPRISES INTRODUCING INTO SUCH A FURNACE WITH THE GASEOUS PRODUCTS OF COMBUSTION, A VOLATILE COMPOUND OF BORON TO THE EXTENT OF AT LEAST 1/20 POUND OF BORON FOR EACH MILLION B. T. U.''S OF HEAT INTRODUCED.
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) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |