US2998086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating core drill
Assignee: Individual
•
Filing: 1954-09-27
•
Granted: 1961-08-29
•
Expires: 1974-09-27
Abstract
No abstract record available.
Inventors
- 👤 Max J Demo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:41
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/48; E21B6/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US402229A
Cited
US296681A
Cited
US1025333A
Cited
US1050806A
Cited
US1290172A
Cited
US1217815A
Cited
US1523629A
Cited
US1940996A
Cited
US2054277A
Cited
US2046210A
Cited
US2176477A
Cited
US2288545A
Cited
US2388720A
Cited
US2412211A
Cited
US2524570A
Cited
US2484471A
Cited
US2587231A
Cited
US2780106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |