US2514832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angle hole digger
Assignee: Individual
•
Filing: 1947-07-21
•
Granted: 1950-07-11
•
Expires: 1967-07-21
Abstract
No abstract record available.
Inventors
- 👤 Robert C Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:23
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/027; E21B7/028; Y; Y10; Y10T; Y10T74/00; Y10T74/17
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US595609A
Cited
US1073821A
Cited
US1271904A
Cited
US1602375A
Cited
US1999115A
Cited
US2081200A
Cited
US2122686A
Cited
US2321680A
Cited
US2410508A
Cited
US2474981A
Cited
US2468319A
Cited
US2453204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |