US4067734A
Expired / Lapsed
US
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Titanium alloys
Assignee: Boeing Co
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Filing: 1974-10-18
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Granted: 1978-01-10
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Expires: 1994-10-18
Abstract
Abstract Disclosed are alloys of titanium possessing improved combinations of strength, toughness and stress corrosion resistance. These titanium alloys contain from 3.8 to 5.3% Al, up to 4.0% Zr, 2.5 to 4.25% Mo, 2.5 to 4.25% V, up to 1.25% Fe, up to 2.2% Cr and up to 1.0% Ni.
Inventors
- 👤 Roland E. Curtis
- 👤 Peter T. Finden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:50
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/10; C23G1/106; C22; C22C; C22C14/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
Alpha-beta phase titanium base alloys consisting essentially of from 3.9% to 4.7% aluminum, from 2.5% to 3.5% zirconium, from 2.5% to 3.5% molybdenum, from 2.5% to 3.5% vanadium and from 1.6% to 2.0% chromium, and containing no more than about 0.13% oxygen, 0.05% nitrogen and 0.08% carbon, oxygen, nitrogen and carbon being impurities, the balance being essentially titanium.
Claim 2
Dependent Claim
58 words
Alpha-beta phase titanium base alloys consisting essentially of from 3.9% to 4.7% aluminum, from 2.5% to 3.5% zirconium, from 2.5% to 3.5% molybdenum, from 2.5% to 3.5% vanadium and from 1.6% to 2.0% chromium, and containing no more than about 0.13% oxygen, 0.05% nitrogen and 0.08% carbon, oxygen, nitrogen and carbon being impurities, the balance being essentially titanium.
Claim 3
Dependent Claim
17 words
Titanium alloys of claim 1 containing no more than about 0.11% oxygen, 0.03% nitrogen and 0.05% carbon.
Claim 4
Dependent Claim
24 words
Titanium alloys of claim 1 consisting essentially of about 4.3% aluminum, about 3.0% zirconium, about 3.0% molybdenum, about 3.0% vanadium and about 1.8% chromium.
Claim 5
Dependent Claim
17 words
Titanium alloys of claim 3 containing no more than about 0.11% oxygen, 0.03% nitrogen and 0.05% carbon.
Claim 6
Dependent Claim
55 words
Titanium alloys consisting essentially of from 4.1% to 4.9% aluminum, from 2.5% to 3.5% zirconium, from 3.25% to 4.25% molybdenum, from 3.25% to 4.25% vanadium and from 0.4% to 0.8% nickel, and containing no more than about 0.13% oxygen, 0.05% nitrogen and 0.08% carbon, oxygen, nitrogen and carbon being impurities, the balance being essentially titanium.
Claim 7
Dependent Claim
55 words
Titanium alloys consisting essentially of from 4.1% to 4.9% aluminum, from 2.5% to 3.5% zirconium, from 3.25% to 4.25% molybdenum, from 3.25% to 4.25% vanadium and from 0.4% to 0.8% nickel, and containing no more than about 0.13% oxygen, 0.05% nitrogen and 0.08% carbon, oxygen, nitrogen and carbon being impurities, the balance being essentially titanium.
Claim 8
Dependent Claim
17 words
Titanium alloys of claim 5 containing no more than about 0.11% oxygen, 0.03% nitrogen and 0.05% carbon.
Claim 9
Dependent Claim
24 words
Titanium alloys of claim 5 consisting essentially of about 4.5% aluminum, about 3.0% zirconium, about 3.75% molybdenum, about 3.75% vanadium, and about 0.6% nickel.
Claim 10
Dependent Claim
17 words
Titanium alloys of claim 7 containing no more than about 0.11% oxygen, 0.03% nitrogen and 0.05% carbon.
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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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |