Patent US1971297A successfully refreshed from Google Patents.
Patent US2386780A successfully refreshed from Google Patents.
US2386780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheeted cellulosic material and abrasive article and process of making the same
Assignee: 3M Co
•
Filing: 1940-12-30
•
Granted: 1945-10-16
•
Expires: 1960-12-30
Abstract
No abstract record available.
Inventors
- 👤 Bert S Cross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:25
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; B; B24; B24D; B24D11/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/109; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31768; Y10T428/31772; Y10T428/31775; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/155; Y10T442/157
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) | 1948-10-15 | 1949-04-16 | 1949-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-10-15 | 1953-04-16 | 1953-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-10-15 | 1957-04-16 | 1957-10-16 | $7700.00 | Window Closed / Lapsed |