US2352653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch means
Assignee: John B. Pierce Laboratory
•
Filing: 1940-08-27
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Granted: 1944-07-04
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Expires: 1960-08-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph F O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:42
CPC Classifications
H; H01; H01H; H01H23/00; H01H23/02; H01H23/025; H01H29/00; H01H29/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-07-04 | 1948-01-03 | 1948-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-04 | 1952-01-03 | 1952-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-04 | 1956-01-03 | 1956-07-04 | $7700.00 | Window Closed / Lapsed |