Patent US3370928A successfully refreshed from Google Patents.
US3370928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten carbide base cerment
Assignee: RTX Corp
•
Filing: 1964-11-13
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Granted: 1968-02-27
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Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Fassler Michael
- 👤 Mervyn H Horner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A HARD, CORROSION-RESISTANT CERMET COMPOSITION CONSISTING OF ESSENTIALLY 50-90 WEIGHT PERCENT OF TUNGSTEN CARBIDE WITH THE BALANCE CONSISTING OF ESSENTIALLY MOLYBDENUM AND COLUMBIUM CARBIDE, THE RATIO OF MOLYBDENUM TO COLUMBIUM CARBIDE BEING 50-90 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
36 words
A HARD, CORROSION-RESISTANT CERMET COMPOSITION CONSISTING OF ESSENTIALLY 50-90 WEIGHT PERCENT OF TUNGSTEN CARBIDE WITH THE BALANCE CONSISTING OF ESSENTIALLY MOLYBDENUM AND COLUMBIUM CARBIDE, THE RATIO OF MOLYBDENUM TO COLUMBIUM CARBIDE BEING 50-90 PERCENT BY WEIGHT.
References Cited (Backward Citations)
US2198343A
Cited
US2253969A
Cited
GB705844A
Cited
US2711009A
Cited
US2731710A
Cited
US3147542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |