US2450423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminal structure
Assignee: Individual
•
Filing: 1944-08-01
•
Granted: 1948-10-05
•
Expires: 1964-08-01
Abstract
No abstract record available.
Inventors
- 👤 John W Fraser
- 👤 Gordon Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:00
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US979652A
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US1404958A
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US1494234A
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US1726543A
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GB379073A
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US2052700A
Cited
US1896143A
Cited
CH205660A
Cited
US2270953A
Cited
CH214341A
Cited
US2194502A
Cited
CH217144A
Cited
US2346162A
Cited
US2383890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |