Patent US4765530A successfully refreshed from Google Patents.
US4765530A
Expired / Lapsed
US
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Method for forming a titanium lined electrochemical cell
Assignee: Dow Chemical Co
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Filing: 1987-02-12
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Granted: 1988-08-23
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Expires: 2007-02-12
Abstract
Abstract The invention is a method comprising: welding a titanium sheet having a thickness of less than about 2 millimeters to a ferrous material through a weldably compatible intermediate material and a titanium intermediate.
Inventors
- 👤 Hiep D. Dang
- 👤 Richard N. Beaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:41
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/005; B23K11/00; B23K11/16; B23K11/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A method for welding a thin titanium sheet to a ferrous substrate comprising sequentially performing the following steps: (a) positioning a substantially homogenous vanadium intermediate adjacent to one surface of a ferrous substrate; (b) then welding a substantially homogenous titanium intermediate to the vanadium, intermediate, and welding said vanadium intermediate to said ferrous substrate; (c) then welding a titanium sheet having a thickness of less than about 2 millimeters to the titanium intermediate.
Claim 2
Independent Claim
73 words
A method for welding a thin titanium sheet to a ferrous substrate comprising sequentially performing the following steps: (a) positioning a substantially homogenous vanadium intermediate adjacent to one surface of a ferrous substrate; (b) then welding a substantially homogenous titanium intermediate to the vanadium, intermediate, and welding said vanadium intermediate to said ferrous substrate; (c) then welding a titanium sheet having a thickness of less than about 2 millimeters to the titanium intermediate.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the titanium intermediate is less than about 2 millimeters thick.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein the vanadium is less than about 0.5 millimeter thick.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein the ferrous material is selected from the group consisting of iron, cast iron, ductile iron, steel, and stainless steel.
Claim 6
Independent Claim
78 words
A method for welding a thin titanium sheet to a ferrous substrate comprising sequentially performing the following steps: (a) positioning a plurality of spaced-apart substantially homogenous vanadium intermediates adjacent to one surface of a ferrous substrate; (b) then welding a homogenous titanium intermediate to each of the vanadium intermediates, and welding each said vanadium intermediate to said ferrous substrate; (c) then welding a titanium sheet having a thickness of less than about 2 millimeters to the titanium intermediates.
Claim 7
Independent Claim
78 words
A method for welding a thin titanium sheet to a ferrous substrate comprising sequentially performing the following steps: (a) positioning a plurality of spaced-apart substantially homogenous vanadium intermediates adjacent to one surface of a ferrous substrate; (b) then welding a homogenous titanium intermediate to each of the vanadium intermediates, and welding each said vanadium intermediate to said ferrous substrate; (c) then welding a titanium sheet having a thickness of less than about 2 millimeters to the titanium intermediates.
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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) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |