US3104981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot dip metal coating method
Assignee: National Steel Corp
•
Filing: 1960-11-22
•
Granted: 1963-09-24
•
Expires: 1980-11-22
Abstract
No abstract record available.
Inventors
- 👤 John T Mayhew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:13
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/34; C23C2/36; C23C2/38; C23C2/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
IN CONTINUOUS STRIP-STEEL HOT-DIP METAL COATING WHEREIN A HEAVY GALVANIZED COATING WEIGHT IS APPLIED SUCH THAT DRAPING OF THE MOLTEN GALVANIZE COATING ON THE STRIP WOULD NORMALLY OCCUR, A METHOD FOR PREVENTING SUCH DRAPING OF THE MOLTEN COATING COMPRISING THE STEPS OF: APPLYING A GALVANIZE COATING TO THE CONTINUOUS STRIP STEEL BY PASSING THE STRIP UPWARDLY THROUGH A MOLTEN METAL BATH, CONTROLLING THE WEIGHT OF THE GALVANIZE COATING TO BE AT LEAST ONE AND ONE-HALF OUNCES PER SQUARE FOOT BY PASSING THE COATED STRIP BETWEEN COATING CONTROL ROLLS LOCATED SO AS TO DELIVER THE STRIP UPWARDLY FROM THE MOLTEN BATH, THE EXITING STRIP AND THE COATING CONTROL ROLLS FORMING A CERVICE LOCATED ON A FACE OF THE STRIP AND CONTAINING A BEAD OF MOLTEN METAL, AND PREVENTING DRAPING OF THE MOLTEN METAL COATING ON THE STRIP AFTER PASSAGE OF THE STRIP THROUGH THE COATING CONTROL ROLLS WITHOUT CHANGING THE COATING WEIGHT BY CONTACTING THE SURFACE OF THE BEAD OF MOLTEN METAL WITH AN IGNITED COMBUSTIBLE GAS ALONG SUBSTANTIALLY THE ENTIRE LENGTH OF THE BEAD, WITH THE DIRECTION AND VELOCITY OF THE BURNING GAS BEING SUCH THAT THE GAS EXERTS SUBSTANTIALLY NO FORCE ON THE MAJOR PORTION OF THE LENGTH OF THE BEAD.
Claim 2
Dependent Claim
202 words
IN CONTINUOUS STRIP-STEEL HOT-DIP METAL COATING WHEREIN A HEAVY GALVANIZED COATING WEIGHT IS APPLIED SUCH THAT DRAPING OF THE MOLTEN GALVANIZE COATING ON THE STRIP WOULD NORMALLY OCCUR, A METHOD FOR PREVENTING SUCH DRAPING OF THE MOLTEN COATING COMPRISING THE STEPS OF: APPLYING A GALVANIZE COATING TO THE CONTINUOUS STRIP STEEL BY PASSING THE STRIP UPWARDLY THROUGH A MOLTEN METAL BATH, CONTROLLING THE WEIGHT OF THE GALVANIZE COATING TO BE AT LEAST ONE AND ONE-HALF OUNCES PER SQUARE FOOT BY PASSING THE COATED STRIP BETWEEN COATING CONTROL ROLLS LOCATED SO AS TO DELIVER THE STRIP UPWARDLY FROM THE MOLTEN BATH, THE EXITING STRIP AND THE COATING CONTROL ROLLS FORMING A CERVICE LOCATED ON A FACE OF THE STRIP AND CONTAINING A BEAD OF MOLTEN METAL, AND PREVENTING DRAPING OF THE MOLTEN METAL COATING ON THE STRIP AFTER PASSAGE OF THE STRIP THROUGH THE COATING CONTROL ROLLS WITHOUT CHANGING THE COATING WEIGHT BY CONTACTING THE SURFACE OF THE BEAD OF MOLTEN METAL WITH AN IGNITED COMBUSTIBLE GAS ALONG SUBSTANTIALLY THE ENTIRE LENGTH OF THE BEAD, WITH THE DIRECTION AND VELOCITY OF THE BURNING GAS BEING SUCH THAT THE GAS EXERTS SUBSTANTIALLY NO FORCE ON THE MAJOR PORTION OF THE LENGTH OF THE BEAD.
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 |