Patent US1684140A successfully refreshed from Google Patents.
US1684140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broach mechanism
Assignee: Perkins Machine & Gear Co
•
Filing: 1927-04-07
•
Granted: 1928-09-11
•
Expires: 1947-04-07
Abstract
No abstract record available.
Inventors
- 👤 Julian L Perkins
- 👤 Hiram D Croft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:52
CPC Classifications
B; B23; B23D; B23D37/00; B23D37/02; B23D37/06; Y; Y10; Y10T; Y10T409/00; Y10T409/40; Y10T409/403675; Y10T409/40385; Y10T409/404375
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) | 1931-09-11 | 1932-03-12 | 1932-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-09-11 | 1936-03-12 | 1936-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-09-11 | 1940-03-12 | 1940-09-11 | $7700.00 | Window Closed / Lapsed |