Patent US3028644A successfully refreshed from Google Patents.
US3028644A
Expired / Lapsed
US
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Composite rod and method of making
Assignee: Individual
•
Filing: 1957-05-01
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Granted: 1962-04-10
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Expires: 1977-05-01
Abstract
No abstract record available.
Inventors
- 👤 Waldrop Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:09
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/067; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12014; Y10T428/12028; Y10T428/12063
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A PROCESS OF FORMING A COMPOSITE ROD HAVING CRUSHED AND SIZED PARTICLES OF SINTERED TUNGSTEN CARBIDE INCLUDING THE STEPS OF WASHING THE CRUSHED, SIZED SINTERED TUNGSTEN CARBIDE PARTICLES TO CLEAN THE SURFACES THEREOF, PLACING A PREDETERMINED QUANTITY IN A GRAPHITE MOLD OF DESIRED SIZE AND SHAPE, HEATING THE CARBIDE PARTICLES AND MOLDS TO A RANGE OF 500*F. TO 900*F., POURING A LIQUID FLUX OVER THE CARBIDE PARTICLES WHILE MAINTAINING THE MOLDS HEATED TO THE RANGE OF 500*F. TO 900*F., PLACING A MATRIX IN THE MOLD ON THE CARBIDE PARTICLES, SAID MATRIX HAVING A COMPOSITION INCLUDING:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |