US3486706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic grinding media
Assignee: 3M Co
•
Filing: 1967-02-10
•
Granted: 1969-12-30
•
Expires: 1987-02-10
Abstract
No abstract record available.
Inventors
- 👤 John D Weyand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:16
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/20; C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/1115
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3034735A
Cited
US3061209A
Cited
US2204582A
Cited
US2358313A
Cited
US2404598A
Cited
US3176925A
Cited
US3239970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |