Patent US2488620A successfully refreshed from Google Patents.
US2488620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool operating system
Assignee: JAMES H KNAPP Co
•
Filing: 1944-10-27
•
Granted: 1949-11-22
•
Expires: 1964-10-27
Abstract
No abstract record available.
Inventors
- 👤 Sydney T Evenstad
- 👤 Jr William F Macglashan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:18
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q16/00; B23Q16/003; Y; Y10; Y10T; Y10T74/00; Y10T74/17; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/19274; Y10T82/00; Y10T82/25; Y10T82/2531; Y10T82/2533; Y10T82/2535
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US373755A
Cited
US1303089A
Cited
US884529A
Cited
US1780083A
Cited
US1989446A
Cited
US2030007A
Cited
US2053399A
Cited
US2071539A
Cited
US2102624A
Cited
US2271717A
Cited
US2324727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |