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Patent US2452073A successfully refreshed from Google Patents.
US2452073A
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Assignee: Individual
•
Filing: 1944-11-17
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Granted: 1948-10-26
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Expires: 1964-11-17
Abstract
No abstract record available.
Inventors
- 👤 Schivley George William
- 👤 Paul W Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:39
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/28; H01Q19/30; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286; H01Q1/287; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1745324A
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US1942594A
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GB399543A
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US2110278A
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GB424747A
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US2199050A
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US2235015A
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US2258407A
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US2216708A
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US2243136A
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US2292791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |