Patent US4992522A successfully refreshed from Google Patents.
Patent US2602709A successfully refreshed from Google Patents.
US2602709A
Expired / Lapsed
US
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Bearing combination
Assignee: Saint Gobain Abrasives Inc
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Filing: 1950-03-24
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Granted: 1952-07-08
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Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
- 👤 Jr William Maxwell Wheildon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:53
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/043; F16C2206/00; F16C2206/80; F16C2206/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A BEARING COMBINATION CONSISTING OF TWO ELEMENTS, ONE OF SAID ELEMENTS BEING A BONDED PIECE OF 99% PURE CARBIDE SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN CARBIDE, TITANIUM CARBIDE AND TANTALUM CARBIDE AND MIXTURES THEREOF, BUT CONTAINING AT LEAST 80% OF TUNGSTEN CARBIDE, SAID CARBIDE PIECE BEING BONDED WITH FROM 3.0% TO 25% OF COBALT AT LEAST 99% PURE, SAID BONDED PIECE OF CARBIDE HAVING A GROUND BEARING SURFACE, AND THE OTHER OF SAID ELEMENTS BEING A PIECE OF SILICON CARBIDE BONDED WITH VITRIFIED CERAMIC BOND SAID PIECE HAVING A GROUND BEARING SURFACE AND SAID PIECE IN VOLUME PERCENTAGE RANGING FROM 40% TO 70% OF SILICON CARBIDE, FROM 20% TO 60% OF SAID VITRIFIED CERAMIC BOND, AND FROM 0% TO 20% PORES.
Claim 2
Dependent Claim
122 words
A BEARING COMBINATION CONSISTING OF TWO ELEMENTS, ONE OF SAID ELEMENTS BEING A BONDED PIECE OF 99% PURE CARBIDE SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN CARBIDE, TITANIUM CARBIDE AND TANTALUM CARBIDE AND MIXTURES THEREOF, BUT CONTAINING AT LEAST 80% OF TUNGSTEN CARBIDE, SAID CARBIDE PIECE BEING BONDED WITH FROM 3.0% TO 25% OF COBALT AT LEAST 99% PURE, SAID BONDED PIECE OF CARBIDE HAVING A GROUND BEARING SURFACE, AND THE OTHER OF SAID ELEMENTS BEING A PIECE OF SILICON CARBIDE BONDED WITH VITRIFIED CERAMIC BOND SAID PIECE HAVING A GROUND BEARING SURFACE AND SAID PIECE IN VOLUME PERCENTAGE RANGING FROM 40% TO 70% OF SILICON CARBIDE, FROM 20% TO 60% OF SAID VITRIFIED CERAMIC BOND, AND FROM 0% TO 20% PORES.
References Cited (Backward Citations)
US2253969A
Cited
US2332241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |