US2540115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse duration selector
Assignee: Individual
•
Filing: 1945-11-29
•
Granted: 1951-02-06
•
Expires: 1965-11-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Hopkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:27
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/02; G01R29/027; G01R29/0273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1516646A
Cited
US2094733A
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US2062616A
Cited
US2083849A
Cited
US2235804A
Cited
US2307315A
Cited
US2339750A
Cited
US2412092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |