US3205565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered rubbing contact material and method for producing same
Assignee: Clevite Industries Inc
•
Filing: 1963-01-21
•
Granted: 1965-09-14
•
Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Macdonald Robert John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:30
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0237; C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0021; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12083; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12882
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
THE METHOD OF FORMING A SINTERED POWDER METAL MEMBER FOR RUBBING CONTACT, INCLUDING THE STEPS OF: BLENDING POWDER PARTICLES SELECTED FROM A GROUP OF MATERIALS WHOSE FREE ENERGY OF OXIDE FORMATION IS MORE POSITIVE THAN LEAD OXIDE AND CONSISTING OF COPPER, SILVER AND ALLOYS THEREOF WITH POWDER PARTICLES CONSISTING ESSENTIALLY OF LEAD OXIDE TO ESTABLISH A UNIFORMLY DISTRIBUTED MIXTURE; COMPACTING SAID MIXTURE OF POWDER PARTICLES TO GREEN DENSITY; AND SINTERING THE COMPACTED MIXTURE IN AN INERT ATMOSPHERE TO METALLURGICALLY BOND THE INDIVIDUAL POWDER PARTICLES TOGETHER.
Claim 2
Independent Claim
85 words
THE METHOD OF FORMING A SINTERED POWDER METAL MEMBER FOR RUBBING CONTACT, INCLUDING THE STEPS OF: BLENDING POWDER PARTICLES SELECTED FROM A GROUP OF MATERIALS WHOSE FREE ENERGY OF OXIDE FORMATION IS MORE POSITIVE THAN LEAD OXIDE AND CONSISTING OF COPPER, SILVER AND ALLOYS THEREOF WITH POWDER PARTICLES CONSISTING ESSENTIALLY OF LEAD OXIDE TO ESTABLISH A UNIFORMLY DISTRIBUTED MIXTURE; COMPACTING SAID MIXTURE OF POWDER PARTICLES TO GREEN DENSITY; AND SINTERING THE COMPACTED MIXTURE IN AN INERT ATMOSPHERE TO METALLURGICALLY BOND THE INDIVIDUAL POWDER PARTICLES TOGETHER.
Claim 3
Dependent Claim
54 words
A SINTERED RUBBING CONTACT FORMED FROM A METAL POWDER MIXTURE OF A MATRIX MATERIAL WHOSE FREE ENERGY OF OXIDE FORMATION IS MORE POSITIVE THAN LEAD OXIDE AND POWDER PARTICLES OF A LEAD OXIDE BASE MIXTURE, SAID POWDER PARTICLES OF SAID LAD OXIDE BASE MIXTURE FORMING INDEPENDENT AND DISCONTINUOUS LAKES EMBEDDED IN SAID MITRIX MATERIAL.
Claim 4
Dependent Claim
54 words
A SINTERED RUBBING CONTACT FORMED FROM A METAL POWDER MIXTURE OF A MATRIX MATERIAL WHOSE FREE ENERGY OF OXIDE FORMATION IS MORE POSITIVE THAN LEAD OXIDE AND POWDER PARTICLES OF A LEAD OXIDE BASE MIXTURE, SAID POWDER PARTICLES OF SAID LAD OXIDE BASE MIXTURE FORMING INDEPENDENT AND DISCONTINUOUS LAKES EMBEDDED IN SAID MITRIX MATERIAL.
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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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |