US2728126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blind-end hole forming device for poured concrete slabs
Assignee: Individual
•
Filing: 1953-04-06
•
Granted: 1955-12-27
•
Expires: 1973-04-06
Abstract
No abstract record available.
Inventors
- 👤 Leslie A Whitlock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:07
CPC Classifications
B; B28; B28B; B28B23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US358505A
Cited
US1310336A
Cited
US2097394A
Cited
US2270286A
Cited
US2286564A
Cited
US2693358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |