Patent US3233372A successfully refreshed from Google Patents.
US3233372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface finishing in high speed gyrating barrels
Assignee: Individual
•
Filing: 1963-05-13
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Granted: 1966-02-08
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 Kobayashi Hisaminc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/02; B24B31/0212; B24B31/0218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF SURFACE FINISHING MINUTE WORKPIECES, COMPRISING PROVIDING AT LEAST ONE ELONGATED DRUM HAVING AN INTERNAL CROSS-SECTIONAL SHAPE OF AN EQUILATERAL POLYGON HAVING FROM FIVE TO EIGHT SIDES, FILLING ABOUT ONE HALF OF SAID ELONGATED DRUM WITH A MIXTURE OF WORKPIECES AND SUBSTANTIALLY SPHERICAL GRAINS OF ABRASIVES, AND RUBBING THE GRAINS OF ABRASIVE AND WORKPIECES IN ONLY A SURFACE LAYER OF THE MIXTURE TOGETHER AND BRINGING SUCCESSIVE PORTION OF MIXTURE INTO THE SURFACE LAYER WHILE SUCCESSIVELY MOVING OTHER PORTIONS FROM THE SURFACE LAYER
Claim 2
Independent Claim
84 words
A METHOD OF SURFACE FINISHING MINUTE WORKPIECES, COMPRISING PROVIDING AT LEAST ONE ELONGATED DRUM HAVING AN INTERNAL CROSS-SECTIONAL SHAPE OF AN EQUILATERAL POLYGON HAVING FROM FIVE TO EIGHT SIDES, FILLING ABOUT ONE HALF OF SAID ELONGATED DRUM WITH A MIXTURE OF WORKPIECES AND SUBSTANTIALLY SPHERICAL GRAINS OF ABRASIVES, AND RUBBING THE GRAINS OF ABRASIVE AND WORKPIECES IN ONLY A SURFACE LAYER OF THE MIXTURE TOGETHER AND BRINGING SUCCESSIVE PORTION OF MIXTURE INTO THE SURFACE LAYER WHILE SUCCESSIVELY MOVING OTHER PORTIONS FROM THE SURFACE LAYER
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |