Patent US3104993A successfully refreshed from Google Patents.
US3104993A
Expired / Lapsed
US
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Galvanizing process
Assignee: Inland Steel Co
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Filing: 1960-09-20
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Granted: 1963-09-24
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Expires: 1980-09-20
Abstract
No abstract record available.
Inventors
- 👤 William C Sievert
- 👤 Hicks Bobby Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:08
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/02; C23C2/022; C23C2/0222; C23C2/0224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A PROCESS OF CONTINUOUSLY PRODUCING A ONE SIDE GALVANIZED STRIP OF FERROUS METAL WHILE LEAVING THE OTHER SIDE OF SAID STRIP UNCOATED WHICH COMPRISES; CONTINUOUSLY APPLYING TO ONLY ONE SIDE OF A FERROUS METAL STRIP PREHEATED TO A TEMPERATURE OF BETWEEN ABOUT 200* AND 300* F. A THIN CONTINUOUS FILM CONSISTING ESSENTIALLY OF ABOUT 97 PARTS OF AN AQUEOUS COLLOIDAL SOLUTION OF SILICA HAVING A SILICA CONCENTRATION OF ABOUT 10% BY WEIGHT OF SAID SOLUTION AND ABOUT 3 PARTS OF AN AQUEOUS PHOSPHORIC ACID SOLUTION CONTAINING ABOUT 85% BY WEIGHT PHOSPHORIC ACID AND ALLOWING SAID FILM TO DRY TO PROVIDE A THIN CONTINUOUS BARRIER COATING BEFORE HEATING SAID STRIP TO A SUBSTANTIALLY ELEVATED TEMPERATURE, CONTINUOUSLY PASSING SAID STRIP THROUGH A TREATING ZONE HAVING A TEMPERATURE BETWEEN ABOUT 1200* AND 1900*F. BEFORE GALVANIZING, CONTINUOUSLY IMMERISING SAID STRIP IN A GALVANIZING BATH WHEREIN ONLY THE OTHER SIDE OF SAID STRIP IS COATED WITH ZINC, AND THEREAFTER REMOVING SAID BARRIER COATING FROM SAID ONE SIDE OF SAID STRIP BY APPLYING AN ABRADING FORCE THERETO WITHOUT CHANGING THE PHYSICAL CHARACTERISTICS OF SAID STRIP TO PROVIDE A ONE SIDE GALVANIZED FERROUS METAL STRIP.
Claim 2
Dependent Claim
188 words
A PROCESS OF CONTINUOUSLY PRODUCING A ONE SIDE GALVANIZED STRIP OF FERROUS METAL WHILE LEAVING THE OTHER SIDE OF SAID STRIP UNCOATED WHICH COMPRISES; CONTINUOUSLY APPLYING TO ONLY ONE SIDE OF A FERROUS METAL STRIP PREHEATED TO A TEMPERATURE OF BETWEEN ABOUT 200* AND 300* F. A THIN CONTINUOUS FILM CONSISTING ESSENTIALLY OF ABOUT 97 PARTS OF AN AQUEOUS COLLOIDAL SOLUTION OF SILICA HAVING A SILICA CONCENTRATION OF ABOUT 10% BY WEIGHT OF SAID SOLUTION AND ABOUT 3 PARTS OF AN AQUEOUS PHOSPHORIC ACID SOLUTION CONTAINING ABOUT 85% BY WEIGHT PHOSPHORIC ACID AND ALLOWING SAID FILM TO DRY TO PROVIDE A THIN CONTINUOUS BARRIER COATING BEFORE HEATING SAID STRIP TO A SUBSTANTIALLY ELEVATED TEMPERATURE, CONTINUOUSLY PASSING SAID STRIP THROUGH A TREATING ZONE HAVING A TEMPERATURE BETWEEN ABOUT 1200* AND 1900*F. BEFORE GALVANIZING, CONTINUOUSLY IMMERISING SAID STRIP IN A GALVANIZING BATH WHEREIN ONLY THE OTHER SIDE OF SAID STRIP IS COATED WITH ZINC, AND THEREAFTER REMOVING SAID BARRIER COATING FROM SAID ONE SIDE OF SAID STRIP BY APPLYING AN ABRADING FORCE THERETO WITHOUT CHANGING THE PHYSICAL CHARACTERISTICS OF SAID STRIP TO PROVIDE A ONE SIDE GALVANIZED FERROUS METAL STRIP.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |