US3623276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicellular lapping head
Assignee: BRIESE INDUSTRIAL TECHNOLOGIES Inc
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Filing: 1970-03-05
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Granted: 1971-11-30
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Expires: 1990-03-05
Abstract
Abstract A GRINDING OR LAPPING HEAD FOR PROVIDING METAL WORKPIECES WITH SPECULAR SURFACE FISHES IS DISCLOSED. SUCH A LAPPING HEAD INCLUDES A GRINDING MEMBER HAVING A GENERALLY ANNULAR SHAPE AND A SUPPORTING OR RETAINING BASE PLATE ATOP WHICH THE GRINDING MEMBER IS MOUNTED. THE GRINDING MEMBER COMPRISES A HONEYCOMB OR CELLULAR CORE EMBEDDED IN A RIGID FOAM MATERIAL WHICH SERVES AS A CARRIER MEDIUM FOR A PARTICULATE ABRASIVE SUBSTANCE.
Inventors
- 👤 Willard C Twigg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:33
CPC Classifications
B; B24; B24D; B24D7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |