US2541571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turnover safety switch
Assignee: Individual
•
Filing: 1949-02-24
•
Granted: 1951-02-13
•
Expires: 1969-02-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth S Clapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:26
CPC Classifications
H; H01; H01H; H01H29/00; H01H29/20; H01H29/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1638132A
Cited
US1726426A
Cited
US1827072A
Cited
US2192797A
Cited
US2192262A
Cited
US2451751A
Cited
US2451107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |