Patent US2831243A successfully refreshed from Google Patents.
US2831243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered powdered copper base bearing
Assignee: Motors Liquidation Co
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Filing: 1954-12-29
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Granted: 1958-04-22
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Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 Robert F Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:33
CPC Classifications
B; B22; B22F; B22F1/00; B22F1/14; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/12; F16C33/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A HIGHLY WEAR-RESISTANT SINTERED POWDERED METAL COMPRISING APPROXIMATELY 0.25% TO 15% AL2O3 PARTICLES, 2% TO 15% NICKEL, AND THE BALANCE SUBSTANTIALLY ALL A METAL SELECTED FROM THE CLASS CONSISTING OF COPPER AND COPPER BASE ALLOYS.
Claim 2
Dependent Claim
35 words
A HIGHLY WEAR-RESISTANT SINTERED POWDERED METAL COMPRISING APPROXIMATELY 0.25% TO 15% AL2O3 PARTICLES, 2% TO 15% NICKEL, AND THE BALANCE SUBSTANTIALLY ALL A METAL SELECTED FROM THE CLASS CONSISTING OF COPPER AND COPPER BASE ALLOYS.
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) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |