Patent US2084329A successfully refreshed from Google Patents.
US2084329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrided article of manufacture
Assignee: Cleveland Twist Drill Co
•
Filing: 1934-10-26
•
Granted: 1937-06-22
•
Expires: 1954-10-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph V Emmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:38
CPC Classifications
C; C23; C23C; C23C8/00; C22; C22C; C22C38/00; C22C38/12; C23C8/06; C23C8/08; C23C8/24; C23C8/26; Y; Y10; Y10T; Y10T407/00; Y10T407/27
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) | 1940-06-21 | 1940-12-21 | 1941-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-21 | 1944-12-21 | 1945-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-21 | 1948-12-21 | 1949-06-22 | $7700.00 | Window Closed / Lapsed |