Patent US3772091A successfully refreshed from Google Patents.
US3772091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Very thin steel sheet and method of producing same
Assignee: Bethlehem Steel Corp
•
Filing: 1969-08-27
•
Granted: 1973-11-13
•
Expires: 1989-08-27
Abstract
Abstract A full-hard killed steel sheet of a maximum gauge of 0.0140 inch having a corrosion-resistant coating thereon, the steel having a minimum yield strength of 100,000 psi. and sufficient formability to be fabricated into can ends and double seamed onto can bodies. The steel is given a single cold reduction of 65 to 95 percent and coated in its full-hard condition.
Inventors
- 👤 E Mayer
- 👤 F Schunk
- 👤 H Rahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:19
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0221; C21D8/0236; C22; C22C; C22C38/00; C21D8/0278; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12722
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
17 words
An article as recited in claiM 1, in which said steel has been killed by vacuum deoxidation.
Claim 2
Dependent Claim
33 words
An article as recited in claim 1, said steel containing at least one element from the group consisting of aluminum, zirconium, vanadium, boron and titanium in an amount effective to kill said steel.
Claim 3
Dependent Claim
147 words
A full-hard steel sheet having a metallic coating thereon, said sheet having a maximum thickness of 0.0140 inch and containing nonmetallic inclusions predominantly in the form of small discrete particles well dispersed throughout the ferriate matrix, said steel sheet having a minimum yield strength of 100, 000 psi. and sufficient formability to be formed into can ends and double seamed onto can bodies, said steel consisting essentially of 0.08 wt. percent max. carbon, 0.15 to 0.60 wt. percent manganese, 0.040 wt. percent max. sulfur, 0.008 wt. percent max. nitrogen, at least one element from the group consisting of aluminum, zirconium, vanadium, boron and titanium in an amount effective to kill said steel, balance iron, the weight ratio of the manganese to the sulfur being at least 8:1, the manganese being equal to or less than 0.40 wt. percent when the sulfur is greater than 0.020 wt. percent.
Claim 4
Dependent Claim
111 words
A full-hard killed steel sheet having a metallic coating thereon, said sheet having a maximum thickness of 0.0115 inch and containing nonmetallic inclusions predominantly in the form of small discrete particles well dispersed throughout the ferrite matrix, said steel sheet having a minimum yield stength of 100, 000 psi. and sufficient formability to formed into can ends and double seamed onto can bodies, said steel consisting essentially of 0.04 to 0.08 wt. percent carbon, 0.25 to 0.40 wt. percent manganese, 0.030 wt. percent max. sulfur, 0.008 wt. percent max. nitrogen, 0.02 to 0.10 wt. percent aluminum, balance iron, the weight ratio of the manganese to the sulfur being at least 8:1.
Claim 5
Dependent Claim
11 words
A can end formed of the steel sheet of claim 1.
Claim 6
Independent Claim
180 words
A method of producing a full-hard steel strip having a metallic coating thereon, said steel strip having a minimum yield strength of 100,000 psi. and sufficient formability to be formed into can ends and double seamed onto can bodies, comprising: a. hot rolling into intermediate gauge strip a killed steel consisting essentially of 0.10 wt. percent maximum carbon, 0.15 to 0.60 wt. percent manganese, 0.040 wt. percent maximum sulfur, 0.008 wt. percent max. nitrogen, balance iron, the weight ratio of the manganese to the sulfur being at least 8:1, the manganese being equal to or less than 0.40 wt. percent when the carbon is equal to or less than 0.08 wt. percent and the sulfur is greater than 0.020 wt. percent, said steel containing nonmetallic inclusions predominantly in the form of small discrete particles well dispersed throughout the ferrite matrix, b. cold reducing said steel strip by 65 to 95 percent to a final gauge of 0.0140 inch max. without annealing said steel during said cold reducing, and c. applying a metallic coating to said strip in its full-hard condition.
Claim 7
Dependent Claim
16 words
A method as recited in claim 10, in which the steel is killed by vacuum deoxidation.
Claim 8
Dependent Claim
32 words
A method as recited in claim 7 in which the steel is killed by the addition of at least one element from the group consisting of aluminum, zirconium, vanadium, boron and titanium.
Claim 9
Independent Claim
188 words
A method of producing a full-hard steel strip, having a metallic coating thereon, said steel having a minimum yield strength of 100,000 psi. sufficient formability to be formed into can ends and double seamed onto can bodies, comprising: a. hot rolling into intermediate gauge strip a steel consisting essentially of 0.08 wt. percent max. carbon, 0.15 to 0.60 wt. percent manbanese, 0.040 wt. percent max. sulfur, 0.008 wt. percent max. nitrogen, at least one element from the grOup consisting of aluminum, zirconium, vanadium, boron and titanium in an amount effective to kill said steel, balance iron, the weight ratio of the manganese to the sulfur being at least 8:2, the manganese being equal to or less than 0.040 wt. percent when the sulfur is greater than 0.020 wt. percent, said steel containing nonmetallic inclusions predominantly in the form of small discrete particles well dispersed throughout the ferrite matrix, b. cold reducing said steel strip by 65 to 95 percent of a final gauge of 0.0140 inch max., without annealing said steel during said cold reducing, and c. applying a metallic coating to said strip in its full-hard condition.
Claim 10
Dependent Claim
95 words
A method of producing a full-hard steel strip having a metallic coating thereon, said steel having a minimum yield strength of 100,000 psi. and sufficient formability to be formed into can ends and double seamed onto can bodies, comprising: a. hot rolling into intermediate gauge strip a steel of the composition recited in claim 5, b. cold reducing said steel strip by 65 to 95 percent to a final gauge of 0.0115 inch max., without annealing said steel during said cold reducing, and c. applying a metallic coating to said strip in its full-hard condition.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |