US2457231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrecking bar
Assignee: Individual
•
Filing: 1946-08-09
•
Granted: 1948-12-28
•
Expires: 1966-08-09
Abstract
No abstract record available.
Inventors
- 👤 William F Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:31
CPC Classifications
E; E04; E04G; E04G23/00; E04G23/08; E04G2023/085
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US407371A
Cited
US425526A
Cited
DE500939C
Cited
US977986A
Cited
US1647576A
Cited
US1828142A
Cited
US2087148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |