US3347760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electropolishing metallic sections for ballon control rings and the like
Assignee: Individual
•
Filing: 1967-03-07
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Granted: 1967-10-17
•
Expires: 1987-03-07
Abstract
No abstract record available.
Inventors
- 👤 Henry R Mckelvie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:56
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; C25F3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THAT METHOD OF MAKING METAL ARTICLES HAVING A CONCAVO-CONVEX SHAPE WHICH COMPRISES THE STEPS OF: FORMING A COLD DRAWN SPRING WIRE OF A PREDOMINANTLY FERROS METAL COMPOSITION INTO A RING WHILE SUBJECTING THE INSIDE ANNULAR METALLIC SURFACE PARTICLES OF THE LATTER TO COMPRESSIVE STRESSES IN EXCESS OF THEIR ELASTIC LIMIT, REMOVING SAID EXCESSIVELY STRESSED PARTICLES TO EXPOSE AN UNDERLYING ROUGH BUT SUBSTANTIALLY UNDAMAGED SURFACE, AND THEN ELECTROPOLISHING SAID UNDERLYING SURFACE.
Claim 2
Dependent Claim
70 words
THAT METHOD OF MAKING METAL ARTICLES HAVING A CONCAVO-CONVEX SHAPE WHICH COMPRISES THE STEPS OF: FORMING A COLD DRAWN SPRING WIRE OF A PREDOMINANTLY FERROS METAL COMPOSITION INTO A RING WHILE SUBJECTING THE INSIDE ANNULAR METALLIC SURFACE PARTICLES OF THE LATTER TO COMPRESSIVE STRESSES IN EXCESS OF THEIR ELASTIC LIMIT, REMOVING SAID EXCESSIVELY STRESSED PARTICLES TO EXPOSE AN UNDERLYING ROUGH BUT SUBSTANTIALLY UNDAMAGED SURFACE, AND THEN ELECTROPOLISHING SAID UNDERLYING SURFACE.
References Cited (Backward Citations)
US3223602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |