US2452989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam grinding machine
Assignee: Devlieg Bullard Inc
•
Filing: 1943-12-18
•
Granted: 1948-11-02
•
Expires: 1963-12-18
Abstract
No abstract record available.
Inventors
- 👤 Harry W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:26
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/08; B24B19/12; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2552
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1249871A
Cited
US1559206A
Cited
US1689370A
Cited
US1817405A
Cited
US1901926A
Cited
US1875163A
Cited
US1933872A
Cited
US2050127A
Cited
US2101789A
Cited
US2187227A
Cited
US2127877A
Cited
US2143258A
Cited
US2187961A
Cited
US2267250A
Cited
US2276260A
Cited
US2247412A
Cited
US2350234A
Cited
US2284319A
Cited
US2321789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |