Patent USRE28552E successfully refreshed from Google Patents.
USRE28552E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cobalt-base alloys
Assignee: —
•
Filing: 1974-08-16
•
Granted: 1975-09-16
•
Expires: 1994-08-16
Abstract
Abstract Strong, wear-resistant and corrosion-resistant products are obtainable from alloys composed of 14- 30% molybdenum, 6- 12% chromium, 0.5--4% silicon and at least 50% cobalt. This alloy contains 30- 60 volume percent of a hard Laves phase and, correspondingly, 40- 70 volume percent of a solid solution matrix phase containing about 75% by weight of cobalt.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:20
CPC Classifications
C; C22; C22C; C22C9/00; C22C19/00; C22C19/07
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
42 words
AN ALLOY COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST 50% COBALT, 14-30% MOLYBDENUM, 6-12% CHROMIUM AND 0.5-4% SILICON, SAID ALLOY HAVING A MICRO-STRUCTURE CONTAINING 30-60 VOLUME PERCENT OF A HARD LAVES PHASE AND, CORRESPONDINGLY, 40-70 VOLUME PERCENT OF A SOLID SOLTION MATRIX PHASE,
Claim 2
Dependent Claim
42 words
AN ALLOY COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST 50% COBALT, 14-30% MOLYBDENUM, 6-12% CHROMIUM AND 0.5-4% SILICON, SAID ALLOY HAVING A MICRO-STRUCTURE CONTAINING 30-60 VOLUME PERCENT OF A HARD LAVES PHASE AND, CORRESPONDINGLY, 40-70 VOLUME PERCENT OF A SOLID SOLTION MATRIX PHASE,
Claim 3
Dependent Claim
16 words
An alloy composition as in claim 1 wherein the amount of cobalt is at least 54%.
Claim 4
Dependent Claim
15 words
An alloy composition as in claim 1 wherein the amount of molybdenum is 26- 28%.
Claim 5
Dependent Claim
15 words
An alloy composition as in claim 1 wherein the amount of chromium is 8- 12%.
Claim 6
Dependent Claim
15 words
An alloy composition as in claim 1 wherein the amount of silicon is 0.5- 2%.
Claim 7
Dependent Claim
59 words
An alloy composition coNsisting essentially of at least 50% cobalt, 14- 30% molybdenum, 6- 12% chromium, 0.5- 4% silicon, up to 10% iron, up to 2% manganese and up to 1% carbon, said alloy having a micro-structure containing 30- 60 volume percent of a hard Laves phase and, correspondingly, 40- 70 volume percent of a solid solution matrix phase.
Claim 8
Dependent Claim
59 words
An alloy composition coNsisting essentially of at least 50% cobalt, 14- 30% molybdenum, 6- 12% chromium, 0.5- 4% silicon, up to 10% iron, up to 2% manganese and up to 1% carbon, said alloy having a micro-structure containing 30- 60 volume percent of a hard Laves phase and, correspondingly, 40- 70 volume percent of a solid solution matrix phase.
Claim 9
Dependent Claim
15 words
An alloy composition as in claim 6 wherein the amount of carbon is 0.2- 0.5%.
Claim 10
Dependent Claim
69 words
A powder metallurgy composition consisting essentially of fine particles of an alloy having a size wherein 95% pass a minus 240 mesh screen, said alloy consisting essentially of at least 50% cobalt, 14- 30% molybdenum, 6- 12% chromium and 0.5- 4% silicon, said alloy having a micro-structure containing 30- 60 volume percent of a hard Laves phase and, correspondingly, 40- 70 volume percent of a solid solution matrix phase.
Claim 11
Dependent Claim
69 words
A powder metallurgy composition consisting essentially of fine particles of an alloy having a size wherein 95% pass a minus 240 mesh screen, said alloy consisting essentially of at least 50% cobalt, 14- 30% molybdenum, 6- 12% chromium and 0.5- 4% silicon, said alloy having a micro-structure containing 30- 60 volume percent of a hard Laves phase and, correspondingly, 40- 70 volume percent of a solid solution matrix phase.
Claim 12
Dependent Claim
71 words
A powder metallurgy composition considering essentially of fine particles of an alloy having a size wherein 95% pass a minus 240 mesh screen, said alloy consisting essentially of at least 54% cobalt, 26- 28% molybdenum, 8- 12% chromium, 0.5%-2% silicon and 0.2- 0.5% carbon, said alloy having a micro-structure containing 30- 60 volume percent of a hard Laves phase and, correspondingly, 40- 70 volume percent of a solid solution matrix phase.
Claim 13
Dependent Claim
71 words
A powder metallurgy composition considering essentially of fine particles of an alloy having a size wherein 95% pass a minus 240 mesh screen, said alloy consisting essentially of at least 54% cobalt, 26- 28% molybdenum, 8- 12% chromium, 0.5%-2% silicon and 0.2- 0.5% carbon, said alloy having a micro-structure containing 30- 60 volume percent of a hard Laves phase and, correspondingly, 40- 70 volume percent of a solid solution matrix phase.
Claim 14
Dependent Claim
70 words
A shaped article consisting essentially of two phases from an alloy composition, 30- 60 volume percent of a Laves phase having the generic formula Mo2Co3Si and, correspondingly, 40- 70 volume percent of a second phase of a solid solution of a matrix phase of a composition containing about 75% by weight cobalt, said alloy consisting of at least 50% cobalt, 14- 30% molybdenum, 6- 12% chromium and 0.5- 4% silicon.
Claim 15
Dependent Claim
70 words
A shaped article consisting essentially of two phases from an alloy composition, 30- 60 volume percent of a Laves phase having the generic formula Mo2Co3Si and, correspondingly, 40- 70 volume percent of a second phase of a solid solution of a matrix phase of a composition containing about 75% by weight cobalt, said alloy consisting of at least 50% cobalt, 14- 30% molybdenum, 6- 12% chromium and 0.5- 4% silicon.
Claim 16
Dependent Claim
68 words
A shaped article consisting essentially of two phases from an alloy composition, 30- 60 volume percent of a Laves phase having the generic formula Mo2Co3Si and, correspondingly, 40- 70 volume percent of a second phase of a solid solution of a matrix phase containing about 75% by weight cobalt, said alloy consisting essentially of at least 54% cobalt, 26- 28% molybdenum, 8- 12% chromium and 0.5- 2% silicon.
Claim 17
Dependent Claim
68 words
A shaped article consisting essentially of two phases from an alloy composition, 30- 60 volume percent of a Laves phase having the generic formula Mo2Co3Si and, correspondingly, 40- 70 volume percent of a second phase of a solid solution of a matrix phase containing about 75% by weight cobalt, said alloy consisting essentially of at least 54% cobalt, 26- 28% molybdenum, 8- 12% chromium and 0.5- 2% silicon.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |