US3069816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive cut-off disks
Assignee: Vanguard Abrasive Corp
•
Filing: 1959-04-22
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Granted: 1962-12-25
•
Expires: 1979-04-22
Abstract
No abstract record available.
Inventors
- 👤 Willard R Pratt
- 👤 Donald H Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:17
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/12; B24D5/123; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |