Patent US3445447A successfully refreshed from Google Patents.
Patent US3854891A successfully refreshed from Google Patents.
US3854891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium composite
Assignee: Allegheny Ludlum Corp
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Filing: 1972-09-25
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Granted: 1974-12-17
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Expires: 1992-09-25
Abstract
Abstract A composite article comprised of at least two metallic layers. One of the layers being a metal from the group consisting of titanium and titanium base alloys and another being steel. The steel being a plain carbon steel having up to 1.5% of carbide former present in a carbide former-to-carbon ratio of from 1.5 to 25.
Inventors
- 👤 J Chivinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:33
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B32; B32B; B32B15/00; B32B15/01; B32B15/013; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12778; Y10T428/12806; Y10T428/12861; Y10T428/12868; Y10T428/12951; Y10T428/12958; Y10T428/12965; Y10T428/12972; Y10T428/12979
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A COMPOSITE ARTICLE COMPRISING OF AT LAST TWO BONDED METALLIC LAYERS: AT LEAST ONE OF SAID METALLIC LAYERS BEING A METAL FROM THE GROUP CONSISTING OF TITANIUM AND TITANIUM BASE ALLOYS, AT LEAST ONE OF SAID METALLIC LAYERS BEING STEEL, SAID STEEL CONSISTING ESSENTIALLY OF UP TO 2% CARBON, UP TO 0.6% SILICON, UP TO 1.65% MANGANESE, UP TO 1.5% CARBIDE FORMER, BLANCE ESSENTIALLY IRON, SAID CARBIDE FORMER BEING FROM THE GROUP CONSISTING OF TITANIUM AND COLUMBIUM, SAID CARBIDE FORMER BEING PRESENT IN A CARBIDE FORMER-TO-CARBON RATIO OF FROM 1.5 TO 25.
Claim 2
Dependent Claim
92 words
A COMPOSITE ARTICLE COMPRISING OF AT LAST TWO BONDED METALLIC LAYERS: AT LEAST ONE OF SAID METALLIC LAYERS BEING A METAL FROM THE GROUP CONSISTING OF TITANIUM AND TITANIUM BASE ALLOYS, AT LEAST ONE OF SAID METALLIC LAYERS BEING STEEL, SAID STEEL CONSISTING ESSENTIALLY OF UP TO 2% CARBON, UP TO 0.6% SILICON, UP TO 1.65% MANGANESE, UP TO 1.5% CARBIDE FORMER, BLANCE ESSENTIALLY IRON, SAID CARBIDE FORMER BEING FROM THE GROUP CONSISTING OF TITANIUM AND COLUMBIUM, SAID CARBIDE FORMER BEING PRESENT IN A CARBIDE FORMER-TO-CARBON RATIO OF FROM 1.5 TO 25.
Claim 3
Dependent Claim
27 words
An article according to claim 1 wherein said carbide former is present in said plain carbon steel in a carbide former-to-carbon ratio of from 1.5 to 5.
Claim 4
Dependent Claim
18 words
An article according to claim 1 wherein said plain carbon steel contains up to 0.75% of carbide former.
Claim 5
Dependent Claim
27 words
An article according to claim 1 wherein said carbide former is present in said plain carbon steel in a carbide former-to-carbon ratio of from 5 to 15.
Claim 6
Dependent Claim
46 words
An article according to claim 1 having at least two layers from the group consisting of titanium and titanium base alloys, and wherein said layer of plain carbon steel is sandwiched between said layers of metal from the group consisting of titanium and titanium base alloys.
Claim 7
Dependent Claim
43 words
An article according to claim 1 including a layer of stainless steel, and wherein said layer of plain carbon steel is sandwiched between said layer of stainless steel and said layer of metal from the group consisting of titanium and titanium base alloys.
Claim 8
Dependent Claim
52 words
An article according to claim 1 including a layer of third metal between said layer of metal from the group consisting of titanium and titanium base alloys and said layer of plain carbon steel, said layer of third metal being from the group consisting of nickel, cobalt, palladium, platinum, copper and chromium.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |