US2576902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for flow brightening electrodeposited tin on tinplate
Assignee: Republic Steel Corp
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Filing: 1943-11-13
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Granted: 1951-11-27
•
Expires: 1963-11-13
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Duby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:09
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/48; C25D5/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF FLOW BRIGHTENING ELECTRODEPOSITED TIN ON TINPLATE WHICH COMPRISES THE STEPS OF CONTINUOUSLY MOVING TINPLATE ENDWISE, GENERATING A PLURALITY OF SEPARATE ALTERNATING CURRENTS AND FLOWING SAID CURRENTS SEPARATELY AROUND AND IN INDUCTIVE RELATION TO SAID TINPLATE IN SEPARATE ZONES ARRANGED ALONG THE LINE OF TINPLATE TRAVEL, EACH OF SAID CURRENTS HAVING A FREQUENCY RANGING BETWEEN ABOUT 100 KC. AND ABOUT 300 KC. AND SUFFICIENT WATTAGE TO MELT THE TIN ON TINPLATE WHILE TRAVELING THROUGH ITS ZONE AT A LINEAL SPEED OF ABOUT 200 FEET PER MINUTE, THE NUMBER OF SUCH ZONES BEING SUFFICIENT TO HEAT THE TIN COATING PROGRESSIVELY WHILE IN SAID ZONES AND TO BRING IT TO MOLTEN CONDITION NEAR THE EXIT END OF THE LAST ZONE WHEN THE TINPLATE IS TRAVELING AT THE DESIRED SPEED BETWEEN ABOUT 200 FEET PER MINUTE AND MORE THAN 1,400 FEET PER MINUTE, AND QUENCHING THE MOLTEN TIN IMMEDIATELY AFTER THE TINPLATE LEAVES THE LAST ZONE.
Claim 2
Independent Claim
155 words
THE METHOD OF FLOW BRIGHTENING ELECTRODEPOSITED TIN ON TINPLATE WHICH COMPRISES THE STEPS OF CONTINUOUSLY MOVING TINPLATE ENDWISE, GENERATING A PLURALITY OF SEPARATE ALTERNATING CURRENTS AND FLOWING SAID CURRENTS SEPARATELY AROUND AND IN INDUCTIVE RELATION TO SAID TINPLATE IN SEPARATE ZONES ARRANGED ALONG THE LINE OF TINPLATE TRAVEL, EACH OF SAID CURRENTS HAVING A FREQUENCY RANGING BETWEEN ABOUT 100 KC. AND ABOUT 300 KC. AND SUFFICIENT WATTAGE TO MELT THE TIN ON TINPLATE WHILE TRAVELING THROUGH ITS ZONE AT A LINEAL SPEED OF ABOUT 200 FEET PER MINUTE, THE NUMBER OF SUCH ZONES BEING SUFFICIENT TO HEAT THE TIN COATING PROGRESSIVELY WHILE IN SAID ZONES AND TO BRING IT TO MOLTEN CONDITION NEAR THE EXIT END OF THE LAST ZONE WHEN THE TINPLATE IS TRAVELING AT THE DESIRED SPEED BETWEEN ABOUT 200 FEET PER MINUTE AND MORE THAN 1,400 FEET PER MINUTE, AND QUENCHING THE MOLTEN TIN IMMEDIATELY AFTER THE TINPLATE LEAVES THE LAST ZONE.
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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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |