US2833638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard facing material and method of making
Assignee: Servco Manufacturing Corp
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Filing: 1955-03-24
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Granted: 1958-05-06
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Expires: 1975-03-24
Abstract
No abstract record available.
Inventors
- 👤 Robert G Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
B; B24; B24D; B24D99/00; B23; B23P; B23P5/00; B24D18/00; E; E21; E21B; E21B10/00; E21B10/46; E21B10/48; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12104; Y10T428/12139; Y10T428/12486; Y10T428/12493; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12799; Y10T428/12861; Y10T428/12882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A HARD SURFACING MATERIAL COMPRISING A PLURALITY OF CONTIGUOUS BODIES OF CEMENTED METAL CARBIDE BONDED TOGETHER BY AND DISPERSED THROUGHOUT A METAL MATRIX, SAID CEMENTED CARBIDE BODIES EACH COMPRISING PARTICLES OF METAL CARBIDE CEMENTED TOGETHER BY A DUCTILE CEMENTING METAL HAVING A LOWER MELTING POINT THAN SAID CARBIDE AND COMPRISING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, IRON AND NICKEL, SAID MATRIX FILLING THE SPACES BETWEEN SAID BODIES, BEING ALLOYED TO SAID CEMENTING METAL AT THE SURFACES OF SAID BODIES AND INWARDLY THEREOF FOR A LIMITED DISTANCE, AND COMPRISING A TOUGH, DUCTILE AND SHOCKPROOF METAL HAVING A MELTING POINT NOT SUBSTANTIALLY HIGHER THAN THE MELTING POINT OF SAID CEMENTING METAL.
Claim 2
Dependent Claim
114 words
A HARD SURFACING MATERIAL COMPRISING A PLURALITY OF CONTIGUOUS BODIES OF CEMENTED METAL CARBIDE BONDED TOGETHER BY AND DISPERSED THROUGHOUT A METAL MATRIX, SAID CEMENTED CARBIDE BODIES EACH COMPRISING PARTICLES OF METAL CARBIDE CEMENTED TOGETHER BY A DUCTILE CEMENTING METAL HAVING A LOWER MELTING POINT THAN SAID CARBIDE AND COMPRISING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, IRON AND NICKEL, SAID MATRIX FILLING THE SPACES BETWEEN SAID BODIES, BEING ALLOYED TO SAID CEMENTING METAL AT THE SURFACES OF SAID BODIES AND INWARDLY THEREOF FOR A LIMITED DISTANCE, AND COMPRISING A TOUGH, DUCTILE AND SHOCKPROOF METAL HAVING A MELTING POINT NOT SUBSTANTIALLY HIGHER THAN THE MELTING POINT OF SAID CEMENTING METAL.
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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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |