Patent US3140131A successfully refreshed from Google Patents.
US3140131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-lubricating bearing
Assignee: Individual
•
Filing: 1958-11-28
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Granted: 1964-07-07
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Expires: 1978-11-28
Abstract
No abstract record available.
Inventors
- 👤 Tann David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:28
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/103; F16C33/104; F16C33/14; F16C33/145; F16C17/00; F16C17/02; F16C2202/00; F16C2202/02; F16C2202/10; F16C33/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A BEARING COMPRISING A BODY OF POROUS SINTERED BEARING MATERIAL HAVING TWO CONCENTRIC RADIALLY SPACED RINGS INTERCONNECTED BY RADIALLY EXTENDING ARMS, THE PORTIONS OF THE INNER RING ADJACENT SAID ARMS HAVING A GREATER DENSITY THAN THE REMAINDER OF THE INNER RING, AND AT LEAST ONE END OF THE INNER RING HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED RADIALLY EXTENDING GROOVES THEREIN, EACH GROOVE BEING DISPOSED BETWEEN A DIFFERENT PAIR OF SAID ARMS.
Claim 2
Dependent Claim
71 words
A BEARING COMPRISING A BODY OF POROUS SINTERED BEARING MATERIAL HAVING TWO CONCENTRIC RADIALLY SPACED RINGS INTERCONNECTED BY RADIALLY EXTENDING ARMS, THE PORTIONS OF THE INNER RING ADJACENT SAID ARMS HAVING A GREATER DENSITY THAN THE REMAINDER OF THE INNER RING, AND AT LEAST ONE END OF THE INNER RING HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED RADIALLY EXTENDING GROOVES THEREIN, EACH GROOVE BEING DISPOSED BETWEEN A DIFFERENT PAIR OF SAID ARMS.
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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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |