US3481841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tin plate treating process to improve corrosion resistance
Assignee: Inland Steel Co
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Filing: 1965-09-20
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Granted: 1969-12-02
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Coy S Ham
- 👤 Lyle Raub
- 👤 Jack E Joyce
- 👤 Robert Lozano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:36
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/48; C25D5/50; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/941; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12722
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD OF MAKING GRADE A AND GRADE K ELECTROLYTIC ACID TIN PLATE WHICH COMPRISES; RAPIDLY HEATING IN A HEATING ZONE A CLEAN DRY LOW CARBON STEEL STRIP HAVING DIRECTLY IN CONTACT WITH THE SURFACE OF SAID STRIP AN ELECTROLYTIC ACID TIN PLATE COATING WEIGHING AT LEAST 0.25 POUND PER BASE BOX FROM A TEMPERATURE OF ABOUT 150* F. TO A TEMPERATURE ABOVE THE MELTING POINT OF TIN WITHIN A PERIOD OF ABOUT 0.2 TO 0.5 SECOND, CONTINUING SAID HEATING OF THE FUSED TIN PLATE TO A TEMPERATURE RANGE OF BETWEEN ABOUT 600* F. AND MAINTAINING SAID TIN PLATE AT SAID TEMPERATURE RANGE FOR A PERIOD OF AT LEAST 0.5 SECOND, AND THEREAFTER RAPIDLY COOLING SAID STRIP BY IMMERSING IN A WATER BATH; TAHEREBY FORMING A SUBSTANTIALLY CONTINUOUS LAYER OF MACRO-CRYSTALS OF FESN2 ALLOY COMPRISING BETWEEN ABOUT 20% AND 30% BY WEIGHT OF SAID TIN COATING.
Claim 2
Independent Claim
146 words
A METHOD OF MAKING GRADE A AND GRADE K ELECTROLYTIC ACID TIN PLATE WHICH COMPRISES; RAPIDLY HEATING IN A HEATING ZONE A CLEAN DRY LOW CARBON STEEL STRIP HAVING DIRECTLY IN CONTACT WITH THE SURFACE OF SAID STRIP AN ELECTROLYTIC ACID TIN PLATE COATING WEIGHING AT LEAST 0.25 POUND PER BASE BOX FROM A TEMPERATURE OF ABOUT 150* F. TO A TEMPERATURE ABOVE THE MELTING POINT OF TIN WITHIN A PERIOD OF ABOUT 0.2 TO 0.5 SECOND, CONTINUING SAID HEATING OF THE FUSED TIN PLATE TO A TEMPERATURE RANGE OF BETWEEN ABOUT 600* F. AND MAINTAINING SAID TIN PLATE AT SAID TEMPERATURE RANGE FOR A PERIOD OF AT LEAST 0.5 SECOND, AND THEREAFTER RAPIDLY COOLING SAID STRIP BY IMMERSING IN A WATER BATH; TAHEREBY FORMING A SUBSTANTIALLY CONTINUOUS LAYER OF MACRO-CRYSTALS OF FESN2 ALLOY COMPRISING BETWEEN ABOUT 20% AND 30% BY WEIGHT OF SAID TIN COATING.
References Cited (Backward Citations)
US3174917A
Cited
US3285838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |