US3149987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating metals
Assignee: Bethlehem Steel Corp
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Filing: 1961-12-11
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Granted: 1964-09-22
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Roger L Crandall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:30
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/224; C; C23; C23C; C23C2/00; C23C2/02; C23C2/022; C23C2/0224; C23C2/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS FOR GALVANIZING ONE SIDE ONLY OF A FERROUS METAL STRIP OR SHEET, COMPRISING APPLYING A COATING CONSISTING ESSENTIALLY OF SODIUM BENTONITE AND WATER TO THE SIDE OF THE STRIP NOT TO BE GALVANIZED, SUBJECTING THE STRIP TO AN ANNEALING TEMPERATURE, COOLING THE STRIP WHILE SURROUNDED BY A NON-OXIDIZING ATMOSPHERE TO APPROXIMATELY THE TEMPERATURE OF THE GALVANIZING BATH, PASSING THE STRIP WHILE STILL SURROUNDED BY SAID NON-OXIDIZING ATMOSPHERE INTO A GALVANIZING BATH AND GALVANIZING THE UNCOATED SIDE OF THE STRIP, THEN COOLING THE STRIP IN THE ATMOSPHERE TO A NON-OXIDIZING TEMPERATURE AND PASSING THE STRIP THROUGH A WATER WASH AND RINSE TO COMPLETELY REMOVE THE BENTONITE COATING FROM THE UNGALVANIZED SIDE OF THE STRIP THUS LEAVING THE UNGALVANIZED SIDE OF THE STRIP WITH A BRIGHT NON-OXIDIZED SURFACE.
Claim 2
Dependent Claim
128 words
A PROCESS FOR GALVANIZING ONE SIDE ONLY OF A FERROUS METAL STRIP OR SHEET, COMPRISING APPLYING A COATING CONSISTING ESSENTIALLY OF SODIUM BENTONITE AND WATER TO THE SIDE OF THE STRIP NOT TO BE GALVANIZED, SUBJECTING THE STRIP TO AN ANNEALING TEMPERATURE, COOLING THE STRIP WHILE SURROUNDED BY A NON-OXIDIZING ATMOSPHERE TO APPROXIMATELY THE TEMPERATURE OF THE GALVANIZING BATH, PASSING THE STRIP WHILE STILL SURROUNDED BY SAID NON-OXIDIZING ATMOSPHERE INTO A GALVANIZING BATH AND GALVANIZING THE UNCOATED SIDE OF THE STRIP, THEN COOLING THE STRIP IN THE ATMOSPHERE TO A NON-OXIDIZING TEMPERATURE AND PASSING THE STRIP THROUGH A WATER WASH AND RINSE TO COMPLETELY REMOVE THE BENTONITE COATING FROM THE UNGALVANIZED SIDE OF THE STRIP THUS LEAVING THE UNGALVANIZED SIDE OF THE STRIP WITH A BRIGHT NON-OXIDIZED SURFACE.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |