Patent US2123777A successfully refreshed from Google Patents.
US2123777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary surface broaching machine
Assignee: COLONIAL BROACH CO
•
Filing: 1935-04-29
•
Granted: 1938-07-12
•
Expires: 1955-04-29
Abstract
No abstract record available.
Inventors
- 👤 William A Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:37
CPC Classifications
B; B23; B23D; B23D43/00; B23D43/06; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5147; Y10T407/00; Y10T407/15; Y10T409/00; Y10T409/40; Y10T409/403325; Y10T409/40455; Y10T409/404725; Y10T409/40525
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-07-11 | 1942-01-10 | 1942-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-07-11 | 1946-01-10 | 1946-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-07-11 | 1950-01-10 | 1950-07-12 | $7700.00 | Window Closed / Lapsed |