US2584534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drop hammer safety device
Assignee: Individual
•
Filing: 1946-11-20
•
Granted: 1952-02-05
•
Expires: 1966-11-20
Abstract
No abstract record available.
Inventors
- 👤 George E Barnhardtson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:53
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/20; B21J7/46; B21K; B21K7/00; B21K7/02; B21K7/06; Y; Y10; Y10S; Y10S425/00; Y10S425/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1082685A
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US1084631A
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US1196764A
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US1184446A
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US1511113A
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US1722506A
Cited
US2246021A
Cited
US2240630A
Cited
US2339214A
Cited
US2429261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |