US2697900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lapping method
Assignee: EIDP Inc
•
Filing: 1953-05-12
•
Granted: 1954-12-28
•
Expires: 1973-05-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/02; B24B5/04; B24B5/045; B24B37/00; B24B37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD FOR THE LAPPING OF AN ARTICLE FABRICATED FROM A METAL ALLOY OR METAL COMPRISING FORCING A DIAMOND DUST ABRASIVE AGAINST SAID ARTICLE IN THE PRESENCE OF A WAX WITH A BALSA WOOD LAP, SAID LAP HAVING A HARDNESS GREATER THAN THAT EVIDENCED BY A DIAMETER OF INDENTATION MEASURING IN EXCESS OF ABOUT 9/32" FOR A 5/8" DIAM. TOOL STEEL BALL PRESSED AGAINST SAID BALSA WOOD WITH A LOADING OF 60 KGS. IN AN END GRAIN DIRECTION, WHILE MAINTAINING A RELATIVE SPEED OF TRANSLATION BETWEEN THE SURFACES OF SAID LAP AND SAID ARTICLE ABOVE ABOUT 5000 FT./MIN. AND A LOADING PRESSURE SUFFICIENT TO BLACKEN SAID WAX IN THE AREA OF CONTACT OF SAID LAP WITH SAID ARTICLE.
Claim 2
Independent Claim
118 words
A METHOD FOR THE LAPPING OF AN ARTICLE FABRICATED FROM A METAL ALLOY OR METAL COMPRISING FORCING A DIAMOND DUST ABRASIVE AGAINST SAID ARTICLE IN THE PRESENCE OF A WAX WITH A BALSA WOOD LAP, SAID LAP HAVING A HARDNESS GREATER THAN THAT EVIDENCED BY A DIAMETER OF INDENTATION MEASURING IN EXCESS OF ABOUT 9/32" FOR A 5/8" DIAM. TOOL STEEL BALL PRESSED AGAINST SAID BALSA WOOD WITH A LOADING OF 60 KGS. IN AN END GRAIN DIRECTION, WHILE MAINTAINING A RELATIVE SPEED OF TRANSLATION BETWEEN THE SURFACES OF SAID LAP AND SAID ARTICLE ABOVE ABOUT 5000 FT./MIN. AND A LOADING PRESSURE SUFFICIENT TO BLACKEN SAID WAX IN THE AREA OF CONTACT OF SAID LAP WITH SAID ARTICLE.
References Cited (Backward Citations)
US2612736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |