US1838520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turning and boring tool
Assignee: English Steel Corp Ltd
•
Filing: 1929-11-11
•
Granted: 1931-12-29
•
Expires: 1949-11-11
Abstract
No abstract record available.
Inventors
- 👤 Archer John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:09
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/16; B23B27/1614; B23B2200/00; B23B2200/04; B23B2200/0457; B23B2200/08; B23B2200/083; B23B2200/12; B23B2200/125; B23B2205/00; B23B2205/04; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2266; Y10T407/2272; Y10T407/2274; Y10T407/2276; Y10T407/23; Y10T407/235
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) | 1934-12-28 | 1935-06-29 | 1935-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-12-28 | 1939-06-29 | 1939-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-12-28 | 1943-06-29 | 1943-12-29 | $7700.00 | Window Closed / Lapsed |