US2521035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Milling cutter
Assignee: American Cutter & Engineering
•
Filing: 1945-06-23
•
Granted: 1950-09-05
•
Expires: 1965-06-23
Abstract
No abstract record available.
Inventors
- 👤 Boyle Calvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:05
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2239; B23C5/2243; B23C5/2247; B23C2200/00; B23C2200/08; B23C2200/086; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1934; Y10T407/1938; Y10T407/22; Y10T407/2222; Y10T407/2252; Y10T407/2256; Y10T407/2258
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US766144A
Cited
US901681A
Cited
US1487259A
Cited
US1529917A
Cited
US1849160A
Cited
US2203104A
Cited
US2407501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |