Patent US2415646A successfully refreshed from Google Patents.
US2415646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for grinding and polishing surfaces
Assignee: Eastman Kodak Co
•
Filing: 1944-05-26
•
Granted: 1947-02-11
•
Expires: 1964-05-26
Abstract
No abstract record available.
Inventors
- 👤 Benjamin E Luboshez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:03
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US426671A
Cited
CH15293A
Cited
US1347766A
Cited
US1873067A
Cited
US2079076A
Cited
US2136036A
Cited
US2164867A
Cited
US2209071A
Cited
US2274332A
Cited
US2352146A
Cited
US2326034A
Cited
US2328459A
Cited
US2352386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-10 | 1950-08-12 | 1951-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-10 | 1954-08-12 | 1955-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-10 | 1958-08-12 | 1959-02-11 | $7700.00 | Window Closed / Lapsed |