US2761440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus for concrete and the like
Assignee: Individual
•
Filing: 1953-04-06
•
Granted: 1956-09-04
•
Expires: 1973-04-06
Abstract
No abstract record available.
Inventors
- 👤 Charles J Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:14
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B25H1/0057; B25H1/0064; B25H1/0035; Y; Y10; Y10S; Y10S408/00; Y10S408/703; Y10T; Y10T408/00; Y10T408/55; Y10T408/557; Y10T408/564; Y10T408/5647
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US459486A
Cited
US1561250A
Cited
US1988538A
Cited
US2084686A
Cited
US2413084A
Cited
US2496939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |