Patent US1733887A successfully refreshed from Google Patents.
Patent US1520382A successfully refreshed from Google Patents.
US1520382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring head
Assignee: Individual
•
Filing: 1923-03-14
•
Granted: 1924-12-23
•
Expires: 1943-03-14
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Workman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:53
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/02; B23B29/027; Y; Y10; Y10S; Y10S408/00; Y10S408/709; Y10T; Y10T408/00; Y10T408/55; Y10T408/556; Y10T408/5565; Y10T408/86; Y10T408/885; Y10T408/888; Y10T408/89; Y10T408/892
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) | 1927-12-23 | 1928-06-23 | 1928-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-12-23 | 1932-06-23 | 1932-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-12-23 | 1936-06-23 | 1936-12-23 | $7700.00 | Window Closed / Lapsed |