US4497771A
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Low tantalum content cobalt-base alloy
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1983-03-07
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Granted: 1985-02-05
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Expires: 2003-03-07
Abstract
Abstract A cobalt-base alloy, particularly suitable for the fabrication of glass spinners and containing up to about 1.2 weight percent tantalum is disclosed.
Inventors
- 👤 Robert E. Spencer
- 👤 Donald L. Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/07; C03; C03B; C03B37/00; C03B37/08; C03B37/0805
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A composition of matter consisting essentially of the following elements in the following amounts expressed in weight percent: Chromium--from about 25 to about 36, Nickel--from about 3.5 to about 13, Wolfram--from about 3 to about 10.5, Tantalum--up to about 1.2, Zirconium--from about 0.005 to about 0.2, Silicon--from about 0.05 to about 2, Carbon--from about 0.35 to about 0.95, Boron--from about 0.001 to about 0.1, Iron--from about 0.01 to about 12, Cobalt--balance, the weight ratio of zirconium to boron being within the range of from about 0.05 to about 35.
Claim 2
Dependent Claim
89 words
A composition of matter consisting essentially of the following elements in the following amounts expressed in weight percent: Chromium--from about 25 to about 36, Nickel--from about 3.5 to about 13, Wolfram--from about 3 to about 10.5, Tantalum--up to about 1.2, Zirconium--from about 0.005 to about 0.2, Silicon--from about 0.05 to about 2, Carbon--from about 0.35 to about 0.95, Boron--from about 0.001 to about 0.1, Iron--from about 0.01 to about 12, Cobalt--balance, the weight ratio of zirconium to boron being within the range of from about 0.05 to about 35.
Claim 3
Dependent Claim
22 words
The composition of claim 1 in which the tantalum content in weight percent is from about 0.8 to about to about 1.2.
Claim 4
Dependent Claim
19 words
The composition of claim 1 in which the tantalum content in weight percent is from about 0.8 to 1.0.
Claim 5
Dependent Claim
20 words
The composition of claim 1 in which the tantalum content in weight percent is from about 0.8 to about 1.1.
Claim 6
Dependent Claim
20 words
The composition of claim 1 in which the tantalum content in weight percent is from about 0.5 to about 1.2.
Claim 7
Dependent Claim
15 words
The composition of claim 1 in which the tantalum content is about 0.9 weight percent.
Claim 8
Dependent Claim
18 words
An article of manufacture produced by casting the composition of matter defined in claim 1 or claim 2.
Claim 9
Dependent Claim
18 words
An article of manufacture produced by casting the composition of matter defined in claim 3 or claim 4.
Claim 10
Dependent Claim
18 words
An article of manufacture produced by casting the composition of matter defined in claim 5 or claim 6.
Claim 11
Dependent Claim
20 words
A spinner comprised of the composition of claim 1, said spinner being comprised of foraminous walls and adapted for rotation.
References Cited (Backward Citations)
US3933484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |