Patent US2088422A successfully refreshed from Google Patents.
US2328577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for grading and for coating with comminuted material
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1940-01-12
•
Granted: 1943-09-07
•
Expires: 1960-01-12
Abstract
No abstract record available.
Inventors
- 👤 Nicholas E Oglesby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:48
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/02; B03C7/023; B03C7/026
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1946-09-06 | 1947-03-08 | 1947-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-06 | 1951-03-08 | 1951-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-06 | 1955-03-08 | 1955-09-07 | $7700.00 | Window Closed / Lapsed |