Patent US1575308A successfully refreshed from Google Patents.
US1575308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling machine
Assignee: RR Donnelley and Sons Co
•
Filing: 1923-11-12
•
Granted: 1926-03-02
•
Expires: 1943-11-12
Abstract
No abstract record available.
Inventors
- 👤 Harley C Alger
- 👤 Raymond E Ackley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:04
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/16; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/375; Y10T408/378; Y10T408/3792
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) | 1929-03-01 | 1929-08-31 | 1930-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-03-01 | 1933-08-31 | 1934-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-03-01 | 1937-08-31 | 1938-03-02 | $7700.00 | Window Closed / Lapsed |