Patent US2500933A successfully refreshed from Google Patents.
US2500933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for machine tools
Assignee: BELL MACHINE Co
•
Filing: 1948-04-30
•
Granted: 1950-03-21
•
Expires: 1968-04-30
Abstract
No abstract record available.
Inventors
- 👤 Lewis A Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:03
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/16; Y; Y10; Y10T; Y10T408/00; Y10T408/08; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18072; Y10T74/1808
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1799113A
Cited
US1912184A
Cited
US2436406A
Cited
US2209608A
Cited
US2277640A
Cited
US2302115A
Cited
US2318031A
Cited
US2352184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |