Patent US3235316A successfully refreshed from Google Patents.
US3235316A
Expired / Lapsed
US
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Journal bearing with alternating surface areas of wear resistant and antigalling materials
Assignee: Hughes Tool Co
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Filing: 1963-04-22
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Granted: 1966-02-15
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 James R Whanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:26
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/23; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/12; F16C33/121; F16C33/14; F16C33/24; F16C2204/00; F16C2204/02; F16C2204/04; F16C2220/00; F16C2220/60; F16C2220/70; F16C2223/00; F16C2223/10; F16C2223/12; F16C2223/30; F16C2223/46; F16C2226/00; F16C2226/10; F16C2226/12; F16C2226/30; F16C2226/32; F16C2226/34; F16C2226/36; F16C2352/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
IN A ROCK BIT BEARING HAVING FRICTION AND ANTI-FRICTION BEARING SURFACES, AND WHEREIN AT LEAST ONE OF SAID FRICTION BEARING SURFACES IS A CARBURIZED AND HEAT TREATED STEEL, THE IMPROVEMENT COMPRISING THE ADDITION TO GROOVES IN SAID AT LEAST ONE FRICTION SURFACE OF SOFT, ANTI-GALLING SILVER ALLOY INLAY, THEREBY GIVING A COMPOSITE SURFACE OF HARD AND WEAR RESISTANT AREAS ALTERNATING WITH SOFT ANTIGALLING MEANS.
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |