US3022232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for simultaneously plating and lapping
Assignee: Caterpillar Inc
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Filing: 1958-05-26
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Granted: 1962-02-20
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Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 John M Bailey
- 👤 Fred S Engelking
- 👤 James L Hopper
- 👤 John P Jero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:44
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/22; C25D5/60; C25D5/605; C25D5/611
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
THE METHOD OF PRODUCING A SURFACE FINISH TO ACCURATE DIMENSIONS WHICH COMPRISES IMMERSING A WORK PIECE IN AN ELECTROLYTIC BATH, MOVING A LAP WHICH HAS GROOVES FORMING INTERMEDIATE LANDS CONFORMING TO THE CONTOUR OF THE SURFACE DESIRED IN CLOSELY SPACED RELATION TO THE WORK PIECE, AND INTRODUCING AN ELECTRIC CURRENT TO SAID BATH THROUGH ANODES DISPOSED IN SAID GROOVES TO CAUSE PLATING OF THE WORK PIECE AND SIMULTANEOUSLY CUTTING AWAY THE DEPOSITED PLATING MATERIAL UNTIL THE DESIRED SURFACE CONFORMS IN CONTOUR TO THE SURFACE CONTOUR OF SAID LANDS.
References Cited (Backward Citations)
GB190018643A
Cited
US1271136A
Cited
US1733404A
Cited
US1886218A
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US1721949A
Cited
US1872290A
Cited
US1953955A
Cited
GB712314A
Cited
US2920026A
Cited
US2871177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |