US3010856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an abradant element for spark generating device
Assignee: Chromalloy Corp
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Filing: 1957-05-08
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Granted: 1961-11-28
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Expires: 1977-05-08
Abstract
No abstract record available.
Inventors
- 👤 Richard P Seelig
- 👤 Richard L Wachtell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:20
CPC Classifications
C; C23; C23C; C23C12/00; F; F16; F16D; F16D69/00; F23; F23Q; F23Q2/00; F23Q2/34; F23Q2/46; F23Q2/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF MAKING AN ABRADANT ELEMENT FOR A SPARK-GENERATING DEVICE WHICH COMPRISES FORMING A FERROUS METAL BLANK HAVING A SERRATED ABRADANT SURFACE HAVING SHARP POINTS, CARBURIZING SAID ABRADANT SURFACE TO INCREASE THE CARBON CONTENT OF THE PORTION OF SAID BLANK ADJACENT TO SAID SURFACE, AND THEREAFTER PACK CHROMIZING SAID CARBURIZED ABRADANT SURFACE TO FORM A HARDENED CASING AT SAID SURFACE ESSENTIALLY COMPOSED OF CHROMIUM CARBIDE WHILE MAINTAINING THE SHARPNESS OF SAID SHARP POINTS OF SAID SERRATED SURFACE.
Claim 2
Independent Claim
78 words
THE METHOD OF MAKING AN ABRADANT ELEMENT FOR A SPARK-GENERATING DEVICE WHICH COMPRISES FORMING A FERROUS METAL BLANK HAVING A SERRATED ABRADANT SURFACE HAVING SHARP POINTS, CARBURIZING SAID ABRADANT SURFACE TO INCREASE THE CARBON CONTENT OF THE PORTION OF SAID BLANK ADJACENT TO SAID SURFACE, AND THEREAFTER PACK CHROMIZING SAID CARBURIZED ABRADANT SURFACE TO FORM A HARDENED CASING AT SAID SURFACE ESSENTIALLY COMPOSED OF CHROMIUM CARBIDE WHILE MAINTAINING THE SHARPNESS OF SAID SHARP POINTS OF SAID SERRATED SURFACE.
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) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |