US3235316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 15:13
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.
References Cited (Backward Citations)
US1122565A
Cited
US1637317A
Cited
US1983283A
Cited
US2104819A
Cited
US2329483A
Cited
US2513634A
Cited
US2599726A
Cited
US2595904A
Cited
FR1053319A
Cited
US2823083A
Cited
US3062599A
Cited
US3113630A
Cited
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 |