US1660477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial drilling machine
Assignee: Joseph T Ryerson and Son Inc
•
Filing: 1920-01-24
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Granted: 1928-02-28
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Expires: 1940-01-24
Abstract
No abstract record available.
Inventors
- 👤 Conrad M Conradson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:49
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/12; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6771; Y10T408/6774; Y10T408/91; Y10T408/93; Y10T408/935; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19242; Y10T74/20; Y10T74/20012; Y10T74/20018
Claims Analysis
Total Claims: 0
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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) | 1931-02-27 | 1931-08-29 | 1932-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-02-27 | 1935-08-29 | 1936-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-02-27 | 1939-08-29 | 1940-02-28 | $7700.00 | Window Closed / Lapsed |