Patent US3594253A successfully refreshed from Google Patents.
US3594253A
Expired / Lapsed
US
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Bonding carbon to steel
Assignee: Stackpole Carbon Co
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Filing: 1968-05-15
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Granted: 1971-07-20
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Expires: 1988-05-15
Abstract
Abstract STEEL AND CARBON MEMBERS ARE BONDED TOGETHER BY A CEMENT FORMED IN SITU BETWEEN THE MEMBERS BY REACTION OF ORTHOPHOSPHORIC ACID AND AN OXYGEN-CONTAINING COMPOUND OF CADMIUM OR OF SILVER OR AN OXYGEN COMPOUND OF BOTH BORON AND ZINC. IN THE PREFERRED EMBODIMENT THE CEMENT HAS DISPERSED THROUGH IT FINELY DIVIDED SILICA. THE BONDS BETWEEN THE TWO MEMBERS REMAIN DESIRABLY STRONG AT ELEVATED TEMPERATURES.
Inventors
- 👤 Robert W Froberg
- 👤 Walter G Krellner
- 👤 Dolores A Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:46
CPC Classifications
C; C09; C09J; C09J1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |