Patent US2987815A successfully refreshed from Google Patents.
US2987815A
Expired / Lapsed
US
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Method of attaching cemented carbide facings to valve lifters and the like
Assignee: Mack Trucks Inc
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Filing: 1957-06-25
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Granted: 1961-06-13
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Expires: 1977-06-25
Abstract
No abstract record available.
Inventors
- 👤 Theodore J Zeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:38
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/302; B23K1/00; B23K1/0008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF BRAZING A CEMENTED CARBIDE FACING TO A FERROUS METAL BACKING COMPRISING PLACING A CEMENTED CARBIDE FACING ADJACENT TO A FERROUS METAL ARTICLE, PLACING A COPPER BRAZING METAL IN POSITION TO FLOW BETWEEN SAID FACING AND SAID ARTICLE WHEN MELTED, HEATING THE ARTICLE AND FACING TO A TEMPERATURE HIGHER THAN THE MELTING POINT OF THE BRAZING METAL TO MELT IT AND CAUSE IT TO FLOW BETWEEN SAID FACING AND ARTICLE, MAINTAINING THE
Claim 2
Independent Claim
74 words
A METHOD OF BRAZING A CEMENTED CARBIDE FACING TO A FERROUS METAL BACKING COMPRISING PLACING A CEMENTED CARBIDE FACING ADJACENT TO A FERROUS METAL ARTICLE, PLACING A COPPER BRAZING METAL IN POSITION TO FLOW BETWEEN SAID FACING AND SAID ARTICLE WHEN MELTED, HEATING THE ARTICLE AND FACING TO A TEMPERATURE HIGHER THAN THE MELTING POINT OF THE BRAZING METAL TO MELT IT AND CAUSE IT TO FLOW BETWEEN SAID FACING AND ARTICLE, MAINTAINING THE
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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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |