Patent US2637715A successfully refreshed from Google Patents.
US2719820A
Expired / Lapsed
US
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Method for coating steel strip
Assignee: United States Steel Corp
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Filing: 1951-01-26
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Granted: 1955-10-04
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Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 William S Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:43
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/34; C23C2/36; C23C4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD OF APPLYING TO STEEL STRIP COATINGS OF METALS OF THE GROUP CONSISTING OF TIN, TERNE, LEAD AND ZINC COMPRISING ELECTROLYTICALLY APPLYING TO THE STRIP A LIGHTWEIGHT PRIME COATING OF ONE OF SAID METALS, SAID PRIME COATING BEING OF A WEIGHT EQUIVALENT TO 0.1 TO 0.2 POUND PER BASE BOX, INTRODUCING THE STRIP TO A SEALED ENCLOSURE HAVING A NON-OXIDIZING ATMOSPHERE, SPRAYING A HEAVIER COATING OF ONE SAID METALS ON THE STRIP WITHIN SAID ENCLOSURE, HEATING THE STRIP WITHIN SAID ENCLOSURE AND CONTROLLING THE HEATING SO THAT THE STRIP SURFACE ATTAINS A TEMPERATURE SUFFICIENT TO MELT THE PRIME COATING AND ALLOY THE COATINGS WITH THE STRIP SURFACE IN THE VICINITY OF THE POINT WHERE THE HEAVIER COATING IS SPRAYED THEREON, AND QUENCHING THE STRIP.
Claim 2
Independent Claim
125 words
A METHOD OF APPLYING TO STEEL STRIP COATINGS OF METALS OF THE GROUP CONSISTING OF TIN, TERNE, LEAD AND ZINC COMPRISING ELECTROLYTICALLY APPLYING TO THE STRIP A LIGHTWEIGHT PRIME COATING OF ONE OF SAID METALS, SAID PRIME COATING BEING OF A WEIGHT EQUIVALENT TO 0.1 TO 0.2 POUND PER BASE BOX, INTRODUCING THE STRIP TO A SEALED ENCLOSURE HAVING A NON-OXIDIZING ATMOSPHERE, SPRAYING A HEAVIER COATING OF ONE SAID METALS ON THE STRIP WITHIN SAID ENCLOSURE, HEATING THE STRIP WITHIN SAID ENCLOSURE AND CONTROLLING THE HEATING SO THAT THE STRIP SURFACE ATTAINS A TEMPERATURE SUFFICIENT TO MELT THE PRIME COATING AND ALLOY THE COATINGS WITH THE STRIP SURFACE IN THE VICINITY OF THE POINT WHERE THE HEAVIER COATING IS SPRAYED THEREON, AND QUENCHING THE STRIP.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |