US3010844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Galvanizing
Assignee: National Steel Corp
•
Filing: 1961-01-06
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Granted: 1961-11-28
•
Expires: 1981-01-06
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Klein
- 👤 Thomas P Caine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:22
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/003; C23C2/0038; C23C2/004; C23C2/0034; C23C2/00342; C23C2/00344; C23C2/0035; C23C2/02; C23C2/022; C23C2/024; C23C2/50; C23C2/52; C23C2/522
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
METHOD OF CONTINUOUSLY PRODUCING TIGHT COAT GALVANIZED FERROUS STRIP MATERIAL USING A COATING BATH OF MOLTEN ZINC AND ALUMINUM ADDITIONS AT AN OPTIMUM COATING TEMPERATURE WHICH COMPRISES TREATING FERROUS STRIP MATERIAL TO REMOVE OXIDES FROM THE STRIP MATERIAL IN CLUDING PASSING THE STRIP THROUGH AN ACID BATH, PASSING THE TREATED STRIP MATERIAL THROUGH A HEATING ZONE CONTAINING A NON-OXIDIZING ATMOSPHERE TO HEAT THE STRIP MATERIAL TO A TEMPERATURE SUBSTANTIALLY BELOW ANNEALING TEMPERATURE FOR THE FERROUS STRIP MATERIAL, PASSING THE HEATED STRIP MATERIAL WITHOUT CONTACT WITH THE ATMOSPHERE THROUGH A TRANSFER ZONE CONTAINING A NON-OXIDIZING ATMOSPHERE AND FROM THE TRANSFER ZONE INTO A COATING BATH WITHOUT CONTACT WITH ATMOSPHERIC AIR AND THEN THROUGH THE BATH, CONTROLLING THE TEMPERATURE OF THE STRIP MATERIAL PASSING THROUGH THE TRANSFER ZONE TO AVOID ABRUPT CHANGES IN THE TEMPERATURE OF THE STRIP MATERIAL, AND MAINTAINING THE STRIP MATERIAL ENTERING THE BATH AT A CRITICAL TEMPERATURE HIGHER THAN THE OPTIMUM COATING TEMPERATURE OF THE BATH BY CONTROLLABLY ADDING HEAT TO THE TRANSFER ZONE TO CONTROL THE HEAT CONTENT OF THE STRIP MATERIAL, THE CRITICAL TEMPERATURE BEING SUCH THAT THE STRIP MATERIAL ENTERING THE BATH CONTINUOUSLY SUPPLIES A QUANTITY OF HEAT TO THE BATH TO MAINTAIN THE BATH AT A TEMPERATURE WITHIN AN OPTIMUM COATING TEMPERATURE RANGE.
Claim 2
Dependent Claim
209 words
METHOD OF CONTINUOUSLY PRODUCING TIGHT COAT GALVANIZED FERROUS STRIP MATERIAL USING A COATING BATH OF MOLTEN ZINC AND ALUMINUM ADDITIONS AT AN OPTIMUM COATING TEMPERATURE WHICH COMPRISES TREATING FERROUS STRIP MATERIAL TO REMOVE OXIDES FROM THE STRIP MATERIAL IN CLUDING PASSING THE STRIP THROUGH AN ACID BATH, PASSING THE TREATED STRIP MATERIAL THROUGH A HEATING ZONE CONTAINING A NON-OXIDIZING ATMOSPHERE TO HEAT THE STRIP MATERIAL TO A TEMPERATURE SUBSTANTIALLY BELOW ANNEALING TEMPERATURE FOR THE FERROUS STRIP MATERIAL, PASSING THE HEATED STRIP MATERIAL WITHOUT CONTACT WITH THE ATMOSPHERE THROUGH A TRANSFER ZONE CONTAINING A NON-OXIDIZING ATMOSPHERE AND FROM THE TRANSFER ZONE INTO A COATING BATH WITHOUT CONTACT WITH ATMOSPHERIC AIR AND THEN THROUGH THE BATH, CONTROLLING THE TEMPERATURE OF THE STRIP MATERIAL PASSING THROUGH THE TRANSFER ZONE TO AVOID ABRUPT CHANGES IN THE TEMPERATURE OF THE STRIP MATERIAL, AND MAINTAINING THE STRIP MATERIAL ENTERING THE BATH AT A CRITICAL TEMPERATURE HIGHER THAN THE OPTIMUM COATING TEMPERATURE OF THE BATH BY CONTROLLABLY ADDING HEAT TO THE TRANSFER ZONE TO CONTROL THE HEAT CONTENT OF THE STRIP MATERIAL, THE CRITICAL TEMPERATURE BEING SUCH THAT THE STRIP MATERIAL ENTERING THE BATH CONTINUOUSLY SUPPLIES A QUANTITY OF HEAT TO THE BATH TO MAINTAIN THE BATH AT A TEMPERATURE WITHIN AN OPTIMUM COATING TEMPERATURE RANGE.
References Cited (Backward Citations)
US2625495A
Cited
US2588439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |