US1393072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Front head for rock-drills
Assignee: Ingersoll Rand Co
•
Filing: 1920-07-06
•
Granted: 1921-10-11
•
Expires: 1940-07-06
Abstract
No abstract record available.
Inventors
- 👤 Bayles Lewis Condict
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:59
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/08; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17564; Y10T279/17923
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) | 1924-10-10 | 1925-04-11 | 1925-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-10-10 | 1929-04-11 | 1929-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-10-10 | 1933-04-11 | 1933-10-11 | $7700.00 | Window Closed / Lapsed |