US1620913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antislip drill-rod device
Assignee: Individual
•
Filing: 1925-07-06
•
Granted: 1927-03-15
•
Expires: 1945-07-06
Abstract
No abstract record available.
Inventors
- 👤 Orwig Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:03
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/14; E21D15/28; E21D15/34; E21B; E21B19/00; E21B19/10; E21B19/102; Y; Y10; Y10S; Y10S137/00; Y10S137/904
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) | 1930-03-14 | 1930-09-13 | 1931-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-03-14 | 1934-09-13 | 1935-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-03-14 | 1938-09-13 | 1939-03-15 | $7700.00 | Window Closed / Lapsed |