US2597381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for removing door handle retaining springs
Assignee: Individual
•
Filing: 1948-06-28
•
Granted: 1952-05-20
•
Expires: 1968-06-28
Abstract
No abstract record available.
Inventors
- 👤 Perry R Roper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:33
CPC Classifications
B; B25; B25B; B25B31/00; B25B27/00; B25B27/14; B25B27/20; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53613; Y10T29/5363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US769650A
Cited
US1684526A
Cited
US1824616A
Cited
US1931690A
Cited
US1984748A
Cited
US2166089A
Cited
US2440485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |