US2695478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for grinding
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1952-12-29
•
Granted: 1954-11-30
•
Expires: 1972-12-29
Abstract
No abstract record available.
Inventors
- 👤 George E Comstock
- 👤 Jr George Crompton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:42
CPC Classifications
B; B24; B24B; B24B1/00; B24B1/04; Y; Y10; Y10S; Y10S451/00; Y10S451/91
Claims Analysis
Total Claims: 0
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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) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |