US2456878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timberman's jack
Assignee: Individual
•
Filing: 1945-01-31
•
Granted: 1948-12-21
•
Expires: 1965-01-31
Abstract
No abstract record available.
Inventors
- 👤 Helen G Krupka
- 👤 Krupka Joseph Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/02; E21D11/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US131920A
Cited
US459086A
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US883904A
Cited
US1190163A
Cited
US1577040A
Cited
US1556539A
Cited
US2211088A
Cited
US2377477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |